National Science Olympiad Forum By SOF Olympiad Trainer - Page 297
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AKSHAJ SRIVASTAVA from MOUNT LITERA ZEE SCHOOL, Kanpur
Subject :NSO    Class : Class 8

Ans 1:

Student from School, City
Class : Class 5
Why

Ans 2:

Arnav Diwan from F.A.I.P.S Kuwait, Kuwait
Class : Class 10
in the first biggest square there are 4 triangles and then when you see the corners there are again 4 triangles (because of the rhombus) then the 4 triangles in the corner are divided into 2 parts parts so there are total 8 small triangles and now if we divide the square diagonally we will get triangles we can divide it in 4 ways so now in total we have 20. now in bigger the rhombus in the corners of it you can find total 4 triangles. then in the smaller square we have a similar square as the bigger one so again 20. in total there are 20 4 20 = 44 and it is not in answer so it is none of these (d)

Ans 3:

Arnav Diwan from F.A.I.P.S Kuwait, Kuwait
Class : Class 10
in the first biggest square there are 4 triangles as we divide it into 4 parts diagonally.

Ans 4:

Dhairya Vinayak from Loyola High School, Patna
Class : Class 8

Ans 5:

Daksha Swaminathan from Horiozon Scholars and Neo Kids, Mumbai
Class : Class 8

Ans 6:

AKSHAJ SRIVASTAVA from MOUNT LITERA ZEE SCHOOL, Kanpur
Class : Class 9
how many triangles are there in this figure....correct answer is d

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CHIRAG from JINDAL VIDYA MANDIR, RATNAGIRI
Subject :NSO    Class : Class 9

Ans 1:

Srijan Bhushan from DPS Gurgaon, Gurgaon
Class : Class 9

Ans 2:

Srijan Bhushan from DPS Gurgaon, Gurgaon
Class : Class 9

Ans 3:

Srijan Bhushan from DPS Gurgaon, Gurgaon
Class : Class 9

Ans 4:

Vijay Raphael R from KV No.2 Kalpakkam, Kalpakkam Chengalpattu
Class : Class 10

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S Pooja from Kendriya Vidyalaya No 2 Kalpakkam, Kanchipuram
Subject :NSO    Class : Class 2

Ans 1:

Aashi Adwita from Delhi Public School , Secunderabad
Class : Class 4
B

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Naitik Jindal from DELHI PUBLIC SCHOOL RK PURAM, DELHI
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Heart, artery and vein of group X are part of circulatory system. Brain and spinal cord of group Y are part of nervous system while liver is a part of digestive system. Kidney, lung and skin of group Z are part of excretory system. Hence, liver cannot be placed in group Y.


Ans 2:

Aarav Chopra from Springdales School, Pusa Road, New Delhi
Class : Class 7
Heart ,artery and veins as you all know are parts of circulatory system . Thus, there is no odd one out in group X. Brain and spinal cord run your nervous system and liver helps in the digestive system . Kidney , skin and even lungs are part of excretory system so group Z is clear .Thus , option 'C' liver is the odd one out as it cannot be placed in group Y .

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Naveed from shining star public high school , mumbai
Subject :NSO    Class : Class 6

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Ishat from DPS, GURUGRAM
Subject :NSO    Class : Class 8

Ans 1:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9
Shouldn't answer be a instead of b

Ans 2:

Antarik Maity from Bharatiya Vidyabhaban, Kolkata
Class : Class 8
answer should be a.

Ans 3:

Navya Jain from DPS Dwarka, delhi
Class : Class 6
Yes, it should be. It is given in the solution also

Ans 4:

Kaushik Srivatsa H from Bala Vidya Mandir Global, Bangalore
Class : Class 7
The answer is given correctly in the solution but wrong in the answer. Answer should be a.

Ans 5:

Akshara from NPS, Bengaluru
Class : Class 8
Answer should be A

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Ishat from DPS, GURUGRAM
Subject :NSO    Class : Class 8

A fire can be made by rubbing two objects together such as rubbing two pieces of rock having rough surfaces. Which of the following statements explain why a fire can be made by rubbing two objects together?
(i) Friction slows down moving objects.
(ii) Fire gives out heat and light energy.
(iii) Friction produces heat.
(iv) Fire has no mass.

A(ii) only
B(iii) only
C(i), (ii) and (iii) only
D(ii) and (iv) only


incorrect answer

Ans 1:

Zach from Frank Anthony public school, Bangalore
Class : Class 8
i agree man

Ans 2:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
I think the question is talking about friction so look for the points which are related to both heat and friction

Ans 3:

Karan Oberoi from Amanora School, Pune
Class : Class 8

Ans 4:

Navya Jain from DPS Dwarka, delhi
Class : Class 6
yes the answer should be B

Ans 5:

Tejashree Colvalcar from Sharda Mandir School, PANAJI GOA
Class : Class 7
the answer is B because fire is caused due to friction not because it gives ot heat and light energy. Sof , could you please clear my doubt

Ans 6:

Akshara from NPS, Bengaluru
Class : Class 8
Yes answer should be B...

Ans 7:

Trina from Ganges Valley School, Hyderabad
Class : Class 8

Ans 8:

Student from School, City
Class : Class 5
On rubbing two sticks together, friction produces heat and this leads to warming until the ignition point of the substance, when it catches fire. As per the options, onrubbing two sticks, *FIRE*produces heat and light and this *PRODUCES FIRE*.

Ans 9:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 8
This is easy

Ans 10:

Arnav Diwan from F.A.I.P.S Kuwait, Kuwait
Class : Class 10
Answer should have been both ii and iii but there isn't such an option

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Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Subject :NSO    Class : Class 4

Which of the following vehicles runs on diesel or petrol?

A
B
C
DAll of these


If bikes have a small engine they will work on petrol only. If cars have medium engine they will work on both petrol and diesel. If trucks have large engine they will work on diesel only.CC of: Bikes: 100 CC Cars: 1000 CC Trucks: 2000 CC And how can you relate all of this with electricity? You have given nowadays cars run on CNG, solar energy and electricity! HOW IN THE WORLD CAN YOU RELATE PETROL AND DIESEL with SOLAR ENERGY AND ELECTRICITY? This question has a simple answer. If you think D answer the questions listed below. 1. Does truck run on petrol? No. 2. Does car run on both petrol and diesel? Yes. 3. Does motorbike run on diesel? No. So answer is A So simple it is!!! If you think D please explain it to me If you think A please do agree

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Pankaj Rajput from RBK GLOBAL SCHOOL, THANE
Subject :NSO    Class : Class 3

Ans 1:

Emma Miriam George from Sophia High School, Bangalore
Class : Class 3
a

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Anoushka Chhauda from Sanskriti, Pune
Subject :NSO    Class : Class 5

Ans 1:

Arthav Mitulkumar Shah from Vashishtha Genesis School, Bardoli
Class : Class 5
Ans - d

Ans 2:

Akshaj Gupta from Neerja Modi School, Jaipur
Class : Class 7

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