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:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

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

Ans 1:

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

Ans 2:

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

Ans 3:

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 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:

Harshit from Montfort , Delhi
Class : Class 7
its c

Ans 2:

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

Ans 3:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4

Ans 4:

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

Ans 5:

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 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

SHUVRA MAITRA from THE HERITAGE , KOLKATA
Class : Class 4

Ans 10:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 11:

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

Ans 12:

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

Ans 13:

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 14:

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

Ans 15:

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 16:

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

Ans 17:

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

Ans 18:

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

Ans 19:

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

Ans 20:

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

Ans 21:

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

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:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10
same

Ans 24:

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 25:

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

Ans 26:

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

Ans 27:

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

Ans 28:

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

Ans 29:

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

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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:

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

Ans 3:

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

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
Its D

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:

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

Ans 9:

Harini from vibgyor high, bangalore
Class : Class 3

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

arpita Jaiswal from bhartiya vidya bhavan, wardha
Class : Class 4
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:

Mihika Talukdar from GARDEN HIGH, KOLKATA
Class : Class 4

Ans 3: (Master Answer)

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

Ans 4:

Raashid Sarfraz from IIPS, Riyadh
Class : Class 6

Ans 5:

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

Ans 6:

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

Ans 7:

Vibhor Mudgal from GBN School, Faridabad
Class : Class 4

Ans 8:

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

Ans 9:

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

Ans 10:

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

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:

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

Ans 13:

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 14:

Rishaan Dixit from DPS Noida, Noida
Class : Class 6
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