National Science Olympiad Forum By SOF Olympiad Trainer - Page 682
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Akshat Paarth from GLOBAL INDIAN INTERNATIONAL SCHOOL , Singapore
Subject :NSO    Class : Class 3

Ans 1:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
Addition of top

Ans 2:

Pritisha priya from Global Indian International School, Abu Dhabi, Abu Dhabi
Class : Class 7
This is with also math, so if you go to IMO with respect , you can do great!

Ans 3:

SARTHAK.SHUKLA from Delhi Public School, Noida, Noida
Class : Class 3
Logic is - Central numbers are increasing in order .... 2...3...4 In first and second figures... Addition of left and right numbers = Addition of top and bottom numbers Means......... In fig1... 2+6 = 5+3 = 8 In fig2... 7+2 = 4+5 = 9 Therefore.... In fig3... 7+3 = 2+8 = 10 Hence the answer is B

Ans 4:

UPASANA KAR from GEAR INNOVATIVE INTERNATIONAL HIGH SCHOOL, BANGALORE
Class : Class 3
can you explain the answer with out a complicated way

Ans 5:

Gaurang Mahesh Mahamunkar from Lodha World School Thane, Thane
Class : Class 4
can somebody explain this question .... why is the ans 3... which number pattern is followed

Ans 6:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
Addition of top

Ans 7:

Gaurang Mahesh Mahamunkar from Lodha World School Thane, Thane
Class : Class 4
Thank you very much Sarthak

Ans 8:

akshitha from Euroschool, Bengaluru
Class : Class 3
can you explain the first answer please?

Ans 9:

akshitha from Euroschool, Bengaluru
Class : Class 3
can sombody explain the firt question

Ans 10:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
Let’s observe the first two sets of numbers (P and Q) carefully, and then try to find the missing number in the 3rd set (R). Let’s take Set P first. Let’s add all the numbers. 2 5 2 3 6 = 18 Now, let’s take Set Q. Again, add all the numbers. 7 4 3 5 2 = 21 Set Q – Set P = 21 – 18 = 3 That means there is a difference of 3 between the total of Set P and Set Q. We can suppose there will be difference of 3 between the total of Set Q and Set R. So, the total of Set R should be Set R – Set Q = 3 Set R – 21 = 3 Or, Set R = 3 21 = 24 Let’s add the numbers in Set R. 7 2 4 8 ? = 24 21 ? = 24 ? = 24 – 21 = 3 Hence, the right answer is Option B.

Ans 11:

Dicksey from Podar international school , Mumbai
Class : Class 1

Ans 12:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
additionoftopandbottomnumbersresultinleftandrightnumberssosolutioniswrong.

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Varenya Srivastava from Podar International School, Powai, Mumbai
Subject :NSO    Class : Class 9

Ans 1:

Arjun Phaneesh from Vidya Vardhaka Sangha Gandhi Centenary School, Bengaluru
Class : Class 10
No,if concentration is higher then it will become HYPOtonic solutionSo, it will swell and endosmosis takes placeSo,A is the answer

Ans 2:

Kinshuk from USPC Jain Public School , Ludhiana
Class : Class 9
B is correct ans. As it will lose water to make both concentration equal.

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adhiraj from Gundecha Education Academy, Mumbai
Subject :NSO    Class : Class 2

Ans 1:

RIDHIMA MIDYA from SOPHIA GIRLS SR. SEC SCHOOL, KOTA
Class : Class 2
PLEASE TELL ME THE ANSWER

Ans 2:

Toushini Datta from The Newtown School, Kolkata
Class : Class 5
You made me be wrong by considering Boat and Ship as "Land transport"

Ans 3:

ARAV MOHTA from Euro School, PUNE
Class : Class 5
there are 8 words

Ans 4:

SHOURYADEEP SANTRA from ABHINAV BHARATI HIGH SCHOLL, HOWRAH
Class : Class 3

Ans 5:

Laxmi vadla from RCIS, Bangalore
Class : Class 2
A-6

Ans 6:

AVYAAN JAIN from SPRING DALE SENIOR SCHOOL, AMRITSAR
Class : Class 6
it has to be 6 as boat and ship are not the means of land transport

Ans 7:

Aarav Ashmit from The DN Wisdom Tree Global School, Bhubaneswar
Class : Class 3
confused again

Ans 8:

sarfaraz khan from sps school rawatbhta, rawathata dist chittorgarh
Class : Class 4

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itssg11 from shriR.N.S.memorial high school, Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Adesh Bharti from Venkateshwar Internation School, New Delhi
Class : Class 7
The vertical centre line of both big diamond also makes a square

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KUSHAL from INDIAN SCHOOL, SOHAR
Subject :NSO    Class : Class 7

Ans 1:

Antareep Mukherjee from New Horizon Public School, Bangalore
Class : Class 8

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

Ans 3:

manya mehta from apeejay school, delhi
Class : Class 7

Ans 4:

Joahanna Gabriel from Christwood school, Chennai
Class : Class 9

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Rajendra Mishra from Kendriya Vidyalaya, Koliwada, Kane Nagar, Mumbai
Subject :NSO    Class : Class 6

Ans 1:

Sahasra Shanker from KV IIT, Chennai
Class : Class 6
plz explain the answer

Ans 2:

Shaurya from Mris 51 Gurugram, Gurugram
Class : Class 7
Please explain the question clearly. Data Inadequate

Ans 3:

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10
the composition of question is not correct in respect of sentence no. 2

Ans 4:

Adhrit from CHSV, Chennai
Class : Class 8
Data is inadequate...and sentence 2 COMPLETELY DISAGREES with the explanation

Ans 5:

Arjun gupta from Dps noida , Noida
Class : Class 7
plz explain

Ans 6:

Ayushree Barman from Sri Sri Academy, Kolkata
Class : Class 6
How can the water actually enter the glass, because there is air inside the glass. The data given in the question is inadequate

Ans 7:

Ashwak from Cambridge, Jalandhar
Class : Class 9
It is very simple . I don't know what you don't understand

Ans 8:

Adhrit from CHSV, Chennai
Class : Class 8

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SMRUTI RANJAN RAY from DELHI PUBLIC SCHOOL DAMANJODI, DAMANJODI
Subject :NSO    Class : Class 7

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Aarohi Tiwari from St Mary ICSE School, NAVI MUMBAI
Subject :NSO    Class : Class 5

Ans 1:

khushie from gdgps , Gurgaon
Class : Class 5
Follow your gut feelings.if you think it's A,then go for A

Ans 2:

Aditya Roy from Vikas The Concept School, Hyderabad
Class : Class 6
40.27 x 3 120.81 i think you multiplied 4.27x3 be carefull

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Anushi Pandey from St xaviers High School, Gurugram
Subject :NSO    Class : Class 5

Ans 1:

Aditya Roy from Vikas The Concept School, Hyderabad
Class : Class 6
D is the answer

Ans 2:

Aditya Roy from Vikas The Concept School, Hyderabad
Class : Class 6
D is the answer

Ans 3:

Ansh singh from Dav model school, Durgapur
Class : Class 5
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

Ans 4:

shaurya from St Gregorios High school, Mumbai
Class : Class 5
D

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Pradeep Mishra from chirec, Hyderabad
Subject :NSO    Class : Class 4

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is B because they are saying the SURFACE of Y is called Crust .Right , because Crust is called the surface of Mantle .

Ans 2:

Miheet parikh from Jamnabai narsee school, Mumbai
Class : Class 2
the answer is wrong

Ans 3:

Aaryav Misra from Vibgyor High, Bengaluru
Class : Class 4
Y is mantle, not crust and Z is the crust, so Z is also not ans.

Ans 4:

Lakshmi from FPS, Bangalore
Class : Class 10
Y is mandle

Ans 5:

Akarsh Anand from DPS Gurgaon , Gurgaon
Class : Class 5

Ans 6:

IAMLOST from ABC, Pune
Class : Class 8
The options are wrong.The solution given by sof is wrong.

Ans 7:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 7
!Read This! You need to read this answer before writing your answer. Everyone is right It should be updated but do not write the wrong answer correct and the correct answer wrong and the wrong answer correct! They are bigger than us and they know more than us. So, the conclusion is that the B option is correct and the else options are wrong.

Ans 8:

Mannat Verma from Vivek High School , Chandigarh
Class : Class 6

Ans 9:

Trijash Maut from Delhi Public School Digboi, Digboi
Class : Class 6

Ans 10:

Goutham from lt, Chennai
Class : Class 4
Ans shud be C!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 11:

Shailaja Divakar from Chennai public school global school, London
Class : Class 6
The answer is C and not B because they told to select the correct option. Y is mantle and the option B they told crust. As Z is crust and covers most of the earth surface, it should be C.

Ans 12:

Tulaa Auti from Vidya valley school, pune
Class : Class 4

Ans 13:

Aneek Dey from Little Angel School, karimganj
Class : Class 6
The solution is mistaken in the end but the answer is b because surface means top and top of y which is mantle is crust and crust makes most of the Earth as it ids the largest portion.

Ans 14:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 7
!Read This! You need to read this answer before writing your answer. Everyone is right It should be updated but do not write the wrong answer correct and the correct answer wrong and the wrong answer correct! They are bigger than us and they know more than us. So, the conclusion is that the B option is correct and the else options are wrong.

Ans 15:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
Totally wrong question

Ans 16:

LAVANYA DADHWAL from BLOOM PUBLIC SCHOOL, South West Delhi
Class : Class 8
I was trying to report error but it was not submitting....

Ans 17:

Ameya Dhuri from Birla Public School, Doha
Class : Class 8
Dumb question

Ans 18:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
What a silly answer! Are dogs, trees and pumpkins growing inside the layers of the earth that they have given such a silly solution? What cheek!

Ans 19:

Anahita Saxena from Ryan International School Pune, Pune
Class : Class 3
ok, why is the answer to almost all questions in these chapters are wrong. They tried to copy the book but they (mistakenly) wrote the wrong answer. The correct answer should be E (made it myself cuz the answer is not there) Surface of Z is the crust. Man, these SOF people need to first read what they have written then upload it so we can study for our test. Even the Admin (Who has the master answer) has no words to say!!!!!!

Ans 20:

Sunishka Khatri from Global Indian International School, Pune
Class : Class 6
The correct answer is C. I am disappointed with the SOF Olympiad. I recommend to not enroll the students for any of the Olympiad, as the material is not adequate and there are too many errors which will confuse children to make their concepts. We are pressurizing our children to take this exam and perform. But actually it will confuse our children instead of making their concept strong.

Ans 21:

Niteen Jit Sahu from Diya Academy of Learning, Bengaluru
Class : Class 7
THe solution is fully wrong, somebody report it direct to SOF founder.

Ans 22:

somesh from Centre point katol road, Nagpur
Class : Class 6
crust is the topmost layer

Ans 23:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Solution is wrong

Ans 24:

APOORVA.GUPTA from DPS Noida, Noida
Class : Class 4
If you count from the centre or the layer after centre , the answer will be Mantle.

Ans 25:

Parth Kathuria from Kothari International School, Noida
Class : Class 4
They have given the solution of another topic in the topic of Earth and Universe.

Ans 26:

Niteen Jit Sahu from Diya Academy of Learning, Bengaluru
Class : Class 7
We have report SOF about this problem. I don't know why is it showing the wrong answer when ever I do this question. Who ever sees this question please report.I don't know why I cant report error. SOF is so bad.

Ans 27:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10

Ans 28:

Aarav Khetarpal from MVN, Faridabad
Class : Class 6
fihfhtdbk

Ans 29:

Mannat Verma from Vivek High School , Chandigarh
Class : Class 6

Ans 30:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
correct answer is 'c' as the middle 2 part are the cores of the earth

Ans 31:

Bhavya Jain from K R Mangalam World Scholl, GHAZIABAD
Class : Class 4
Z IS THE CRUST AND Y IS THE MANTLE OS THE CORRECT ANSWER IS C AS CRUST TAKES MOST OF EARTHS SPACE

Ans 32:

from ,
Class : Class 5
solution given is wrong

Ans 33:

Soorya Tej R from Delhi Public School, Hyderabad
Class : Class 4
the question should be incorrect and the solution is wrong

Ans 34:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 35:

Shailaja Divakar from Chennai public school global school, London
Class : Class 6
Z is the crust as it is at the first. The solution has been written wrong because it is from planets question.

Ans 36:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
Answer is A as :W inner coreX outer core Y mantleZ crustThey have not specified alsoAnd crust does not make up most of the Earth's volumeIt is a logical type of questionIf W is core then also C is wrong as W is making up most of the Earth'svolume so answer is A only

Ans 37:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10

Ans 38:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
The solution is completely wrong!Does anyone know the email ID,mobile no. or address of anyone working with SOF? We could inform them and then if that person can do it well and good or that person could tell the correct person.We need the solution to be correct.

Ans 39:

avsonawane from Blue Ridge Public School, Pune
Class : Class 9
Options for this question are wrong. Need to update the question.

Ans 40:

Shreyansh Saha from Garden High School, Kolkata
Class : Class 6
reported error

Ans 41:

Ridhan from SFS janakpuri, New Delhi
Class : Class 5
silly and fully wrong

Ans 42:

Shivesh Senthilkumar from vels vidyashram, chennai
Class : Class 6
Z is the crust. So answer should be C. Please update the solution as the solution also seems to be wrong. Diagram shows four layers and outer layer will be crust.

Ans 43:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
The diagram is also not labelled correctly

Ans 44:

Arhan Shri Gupta from Mayoor Private School, Abu dhabi
Class : Class 7
The solution of this answer is wrong. Don’t follow the solution.

Ans 45:

Sudarsan Dalabehera from ,
Class : Class 3
Y is mantle.

Ans 46:

Arnav kaul from Chirec, Hyderabad
Class : Class 2
Answer is b

Ans 47:

Syon from Sentia The Global School, Hyderabad
Class : Class 8
The Toppest layer is the crust not the mantle. Y shows below Z ,and Zealand means mantlemail which is below the crust

Ans 48:

Sandipta Bhattacharjee from Sri Ram Narayan Singh Memorial High School, Kolkata
Class : Class 5
They have given the explanation of some other question in the solution though, B is the correct answer.

Ans 49:

Diya Jasmina from Samsidh MLZS, Bengaluru
Class : Class 4
All of you're worrying. The answer is B as per the MTG olympiad book. there the options were:W and X are liquid layersLayer above Y is crustLayer Z makes most of the earth's volumeall of theseTHE OPTION B LAYER ABOVE Y IS CALLED CRUST is correct in the book.As that is the ground and above the ground is the sky and atmosphere which is called crust and here its written SURFACE ABOVE Y IS CRUST because Y is land and above land is crust. All of you were thinking they told Y as crust and that's wrong but they said Surface above Y which is Z . They're correct.

Ans 50:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
the correct answer is bb b b b b b b b.

Ans 51:

Shiven Dinkar from DPS Noida, Delhi
Class : Class 4

Ans 52:

Ainesh das from Chrysalis, Bangalore
Class : Class 4
Solution (living and non-living beings) is wrong as it is not related to the questions (Earth's various layer). SOF trainer kindly look into this. thanks

Ans 53:

Adit Aggarwal from Vibgyor High, Bengaluru
Class : Class 5
The solution given is wrong. There is no explanation of why B is correct as Layer Y should actually be Mantle.

Ans 54:

Shaurya Veer from Army Public School ASC C and C , Bangalore
Class : Class 10
the solution of this question is wrong

Ans 55:

Aryan Swain from Kendriya Vidyalaya, Barimul, Kendrapara
Class : Class 5
It's so unfair.

Ans 56:

Rayansh Mishra from VIBGYOR HIGH MAGARPATTA, Pune
Class : Class 9
Z is crust not , Y is mantle

Ans 57:

Atharv from Lakshdham high school , Mumbai
Class : Class 6
Z is crust and Y is mantle

Ans 58:

Arnav kaul from Chirec, Hyderabad
Class : Class 2
Answer is b

Ans 59:

Anika S Kumar from Alphabets International school , Chennai
Class : Class 7
This is wrong

Ans 60:

TRINABH PANDA from NPSI, Chennai
Class : Class 6

Ans 61:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 7
I think this question is totally wrong- W is Inner core,X is outer core,Y is mantle and Z Crust so how can they(SOF) is saying that 'B' is the correct option

Ans 62:

suday ghai from DPS NOIDA, GAUTAM BUDDHA NAGAR
Class : Class 4
they have given an incorrect solution,dog,elephant and wood are not related to this question.

Ans 63:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
guys, calm down. we do not stand on the crust, we stand on the earth. so z is the earth, y is the crust, x is the outer core and w is the inner core.If you go and see the information of the exam, the have not mentioned mantle, so what ever information is given, you have to follow it to get the answer. So the answer is B.

Ans 64:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
The solution is related to the chapter of plants.

Ans 65: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

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