National Science Olympiad Forum By SOF Olympiad Trainer - Page 112
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Rishab Murthy from Birla Public School , Doha
Subject :NSO    Class : Class 4

Ans 1:

Vaajith from THE ELEGANT PUBLIC SCHOOL, Palakkad
Class : Class 4
Yes, it is D, but they are saying it is C.

Ans 2:

ADITYA ROY from VIDYASAGAR SHISHU NIKETAN, MEDINIPUR
Class : Class 5
yes the answer is D

Ans 3:

Aayansh Bhatnagar from Apeejay School, Noida, Noida
Class : Class 4
it should be D

Ans 4:

Suharto from Springdale High School , Kalyani
Class : Class 4
It's D

Ans 5:

Arshya from KV Meenambakkam, Chennai
Class : Class 7
YES , IT IS D

Ans 6:

Rishika Raj Sinha from Delhi World Public School, Noida Extension
Class : Class 9
the answer is d

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Rohan David from Oakridge International school, Hyderabad
Subject :NSO    Class : Class 4

Ans 1:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
C C c everyone can seethe answer is Ceveryone plz agree

Ans 2:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
The correct option is c

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The correct answer is C.

Ans 4: (Master Answer)

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

Ans 5:

Adarsh from DPS, Raipur
Class : Class 5
The correct answer is c

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Aditya Avadhani from Deens Academy, ECC road, Whitefield, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Arjun Gourineni from CHIREC International School, Hyderabad
Class : Class 7
D is the ans

Ans 2:

Aarav from SNBP, Pune
Class : Class 4
It’s c because talcum powder does work on fresh ink stains and petrol works on oil and grease everyone should know that cotton need soft detergent

Ans 3:

Bhavya Sheth from Bright Day School, Vadodara
Class : Class 6
Yes answer should be D because I also think like Vidhya M.

Ans 4:

somesh from Centre point katol road, Nagpur
Class : Class 6
B

Ans 5:

NARAYANAN VENKITASUBRAMANI from THE PSBB MILLENNIUM SCHOOL, Coimbatore
Class : Class 8

Ans 6:

Harshit from Montfort , Delhi
Class : Class 7
its c

Ans 7:

Goutham from lt, Chennai
Class : Class 4
The answer should be D. How can A and B be correct?

Ans 8:

SUHARSH SAXENA from dpsnoida, Noida
Class : Class 5
No d is not the answer I have google it it is showing g that a Is a bad idea

Ans 9:

Goutham from lt, Chennai
Class : Class 4
The answer should be D. How can A and B be correct?

Ans 10:

Vidhya M from Vibgyor High Bannerghatta, Bangalore
Class : Class 7
I don't believe that fresh ink stains can be removed with talcum powder and oil and grease can be removed with petrol. I think the answer should be "D"

Ans 11:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
no no ans should be d because how will we get petrol

Ans 12:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is C

Ans 13:

Midhuna from ABCD, Banglore
Class : Class 3
Answer is C

Ans 14:

Gunnit Kant from DPS, Nerul, Navi Mumbai
Class : Class 5
c

Ans 15:

Suhana Kedia from Griffin's international school, Kharagpur
Class : Class 5
Maybe dry cleans have a chemical that contains petrol for oil grease

Ans 16:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10
same

Ans 17:

Sreejani Bhaduri from National Public School, Bangalore
Class : Class 10
Ps

Ans 18:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7

Ans 19:

Avya Pandey from NPS International, Singapore
Class : Class 8
it should be D

Ans 20:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Explanation please

Ans 21:

Samarth Vijay Yeliathaya from Shri Kumarans Children home,cbse, Bangalore
Class : Class 5
Even I thought 'D' is the answer

Ans 22:

avsonawane from Blue Ridge Public School, Pune
Class : Class 9
the correct option shall be "D". The answer marked in the system shall be reviewed...

Ans 23:

Shivam Chablani from The Shriram Millenium School , Faridabad
Class : Class 5
The answer should be D

Ans 24:

Anshuman raj from STCS, Karnal
Class : Class 9
Actually fresh ink stains can be lighten by using talcum powder and in dry cleans stores petrol is used to remove oil and grease So from my side C is the answer

Ans 25:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 26:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4
yes ans should be d

Ans 27:

SHUVRA MAITRA from THE HERITAGE , KOLKATA
Class : Class 4

Ans 28:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4

Ans 29:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
Answer is most probably C

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pydimarri@gmail.com from Vibgyorhigh, Bengaluru
Subject :NSO    Class : Class 4

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Navneeth Reejish from Yuvabharati International school, Singapore
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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

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Agnimitra Gupta from south point school, Kolkata
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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

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Ambit Biswas from Oriental Public School, Kalyani, Kalyani
Subject :NSO    Class : Class 4

Ans 1:

sai ramakrishna GUDIMETLA  from AMM MATRICULATION HIGHER SECONDARY SCHOOL, Chennai
Class : Class 5
ans:none of these 365 days 6 hours

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OISHIK KUNDU from Delhi Public school North kolkata, baranagar
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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

Ans 2:

Tvisha Bindal from Manav Rachna International School Sector 14, Faridabad
Class : Class 4
Its D

Ans 3:

Sheel Mehta from Riverside, Ahmedabad
Class : Class 4
The Correct Answer Is A

Ans 4:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
please help help master answer explain

Ans 5:

Tvisha Bindal from Manav Rachna International School Sector 14, Faridabad
Class : Class 4
not sure

Ans 6:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 7
it's 'd' or 'a'..... not sure

Ans 7:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 7
Can you tell the answer to this question

Ans 8:

Harini from vibgyor high, bangalore
Class : Class 3

Ans 9:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
d is the answer

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SHREYASHI.CHANDRA from DPS Noida, Greater Noida West
Subject :NSO    Class : Class 4

Ans 1:

arpita Jaiswal from bhartiya vidya bhavan, wardha
Class : Class 4
Please give solution

Ans 2:

Sukrit from Swami vivekanand high school , Mumbai
Class : Class 6
HOW MANY SQUARES ARE THERE AND GIVE SOLUTION

Ans 3:

ADITYA ROY from VIDYASAGAR SHISHU NIKETAN, MEDINIPUR
Class : Class 5
This answer should be three.

Ans 4:

Kavitharini Joseph from HUS, Chennai
Class : Class 6
i cant count please give solution

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Pratibha from Vaels billabong international, Chennai
Subject :NSO    Class : Class 4

Ans 1:

Aarush Pandya from Inventure Academy, Bangalore
Class : Class 8
The correct answer is C because if organism X wipes out all tadpoles in the community, then water insects' population grows with nothing to eat them. The small fish die because they have nothing to eat, and soon the big fish die too.

Ans 2:

Manan thorat from Podar powai, Mumbai
Class : Class 4
The answer is C

Ans 3:

k tagore from montessori school, KURNOOL
Class : Class 3
The correct answer is c

Ans 4:

Priyanshi from Delhi Public School, Gurugram
Class : Class 4
the correct answer is C

Ans 5:

Gurnoor from Chitkara International School, Chandigarh
Class : Class 5
ans is c

Ans 6:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Aarush , there will be not enough plants to feed so many water insects . So, at a particular time all plants will finish . So , there will be nothing left for the water insects so they will also die !

Ans 7:

Mihika Talukdar from GARDEN HIGH, KOLKATA
Class : Class 4

Ans 8:

Abhigyan Sinha from Podar International School, Powai, Mumbai, Mumbai
Class : Class 7
correct answer is C

Ans 9:

Rishaan Dixit from DPS Noida, Noida
Class : Class 6
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 10:

Raashid Sarfraz from IIPS, Riyadh
Class : Class 6

Ans 11:

Manjeet Prajapati from Saint Xavier College BHEL Jhansi , Jhansi
Class : Class 4
In the given food chain, tadpole feeds on water insect and in turn is eaten by small fish. If population of tadpole will decline with time then small fish population will also decrease as former is the food of later. On the other hand, water insect population will be positively affected because in the absence of predator prey population reproduces and flourishes.

Ans 12:

Vibhor Mudgal from GBN School, Faridabad
Class : Class 4

Ans 13:

Kriti Bhonsale from Delhi Public School, Bengaluru
Class : Class 5
C

Ans 14: (Master Answer)

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

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