National Science Olympiad Forum By SOF Olympiad Trainer

Yasmeen Shaikh from Ryan International CBSE, Mumbai

Subject :NSO Class : Class 4

Study the given diagram carefully. The number represented by (?) is _______.

(A) 24

(B) 16

(C) 64

(D) 196
how come 16

View All Answers (5)

Ans 1:

Adithi Keshava from National Center For Excellence , Bangalore

Class : Class 7

Ans 2:

Tarpan Pramanik from J.N.Academy, Berhampur

Class : Class 5

1.Actually the reason behind this is 10÷2*5=25 Now here 25 s square means 25*25= 625 2. In the same way in pattern ii, 9÷3*2=6 which is the square root of 36 3. According to this logic 8÷4*2=4 which is the square root of 16. So, the correct answer is option (b) 16

Ans 3:

Bidusmita Rath from Sri Chaitanya Techno School, Bangalore

Class : Class 5

how to formulate such a complex Q: in exam....?

Ans 4:

nitin loya from prabhat kids, Akola

Class : Class 4

easy but Brainny

Ans 5:

Himani Arora from JVM, Ballari

Class : Class 5

The logic behind answer..?

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HARSHIKAA DHAR from Delhi Public School, Noida

Subject :NSO Class : Class 4

Beena observed the Moon on 15th December and drew its sketch as shown. What will be the shape of the moon on 13th January ?

(A)

(B)

(C)

(D)

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is C.

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HARSHIKAA DHAR from Delhi Public School, Noida

Subject :NSO Class : Class 4

Find the perimeter of the given figure (not drawn to scale).

(A) 68 cm

(B) 65 cm

(C) 57 cm

(D) 71 cm

View All Answers (7)

Ans 1:

ABHAY AGARWAL from ,

Class : Class 3

Ans is sixty five (B)

Ans 2:

S Nithyanth from Geethanjali Vidyalaya, Bangalore

Class : Class 6

Ans 3:

Jayanth from The Deens Academy, Bengaluru

Class : Class 4

Ans 4:

ABHAY AGARWAL from ,

Class : Class 3

This is terrible

Ans 5:

S Nithyanth from Geethanjali Vidyalaya, Bangalore

Class : Class 6

same

Ans 6:

OISHIK KUNDU from Delhi Public school North kolkata, baranagar

Class : Class 4

same as me

Ans 7:

Priyam Bhattacharya from cambridge court high school, jaipur

Class : Class 6

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Adivishnu SP from Delhi Public School Nadergul, Hyderabad

Subject :NSO Class : Class 4

In the given food web, how many animals are
a. only plant eaters?
b. only animal-eaters?

            a            b
A 3            4
B 2            2
C 1            5
D 4            3

explain it please

View All Answers (10)

Ans 1:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 8

They haven't specified that it should be ONLY animal eater.

Ans 2:

Punyatoya from Harvest, Bengaluru

Class : Class 8

True

Ans 3:

BV Karthikeya from Sentia, Hyderabad

Class : Class 6

Ans 4:

Lakshya Singh Tomar from DPS Noida, Noida

Class : Class 4

please SOF don`t be mad

Ans 5:

Aahana Agarwal from NPS Koramangala, Bengaluru

Class : Class 6

They haven't said that the only animal eaters .

Ans 6:

Punyatoya from Harvest, Bengaluru

Class : Class 8

True

Ans 7:

RAGHAV VARSHNEY from CITY MONTESSORI SCHOOL GOMTINAGAR LUCKNOW, Lucknow

Class : Class 7

Ans 8:

Punyatoya from Harvest, Bengaluru

Class : Class 8

Ans 9:

TANVI D MARGHADE from PODAR INTERNATIONAL SCHOOL POWAI, MUMBAI

Class : Class 6

Ans 10:

Sarthak Gupta from DPS, Haryana

Class : Class 4

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Adivishnu SP from Delhi Public School Nadergul, Hyderabad

Subject :NSO Class : Class 4

Which of the following are NOT means of mass communication?
a. Telephone
b. Magazine
c.   Postcard
d. Newspaper
e.  Television
f.   Radio

A a , b and d
B d , e and f
C b and c
D a

Can I get an explanation for this

View All Answers (7)

Ans 1:

Archit Das from NPS, Singapore

Class : Class 6

Ans 2:

Meghav Ladani from zydus school for excellence, ahmedabad

Class : Class 8

Ans 3:

Nithya Soman from The Charter School, Eranakulam

Class : Class 2

gidjodl;.zmnaol,;d,vsjdik.rijziunewejndi,jzzjnxdmerbnebfxzudhsjpojfiujc,xi.kzopfxok,.t,bv

Ans 4:

Iraj Singh from DPS Megacity, Kolkata

Class : Class 9

The correct answer is D.

Ans 5:

Vivaan from Rustomjee Cambridge International School and Junior College, Mumbai

Class : Class 6

Ans 6:

Vivaan A V from Loyola school, Jamshedpur

Class : Class 4

NONE OF THE ANSWERS ARE CORRECT!!IT IS 'A' AND 'C' SOF!PLZ CORRECT IT

Ans 7: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

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Nirali Rashesh Desai from ,

Subject :NSO Class : Class 4

People living in different states of India, wear different types of clothes, depending on the climate and tradition of the state. Which amongst the following represents the state of India which does not have any coastal areas?

A
B
C
D

View All Answers (4)

Ans 1:

Aarush from Podar, Mumbai

Class : Class 10

b

Ans 2:

PRANSHU AGRAWAL from The Jain International School, Bilaspur

Class : Class 6

The answer is Bbecause A is a Maharashtrian , C is gujurati , D is bengali and B is punjabi which does not live near coastal areas

Ans 3:

ABHAY AGARWAL from ,

Class : Class 3

answer shd be k

Ans 4:

AARUSH from DPS, Mumbai

Class : Class 4

Yes it is B

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Spandan Mohanty from Psbb Millennium , Chennai

Subject :NSO Class : Class 4

Two organisms Y and Z depend on plants for their food requirement. Organism Y eats plants directly while organism Z depends on plants indirectly. If all the plants in this area are wiped out, then

A organism Y will be the most affected
B organism Z will be the most affected
C organism Y will not be affected at all
Dorganism Z will not be affected at all

this question came wrong to me after i gave the science level-2 mock test. please help me with its explantion

View All Answers (2)

Ans 1:

AARUSH from DPS, Mumbai

Class : Class 4

A

Ans 2:

Admin from Revisewise, Noida

Class : Class 3

If all plants in the area are wiped out the Organism Y will be affected most as it is directly dependent on the plants for its food requirement.

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Aarush Semwal from DPS Noida, Noida

Subject :NSO Class : Class 4

Rajeev put a leaf he had just plucked, into a beaker of warm water as shown. He noticed bubbles coming out of the leaf. He noticed more bubbles on the lower surface of leaf. Which of the following is the correct explanation for this?

A Photosynthesis can take place on the lower surface of the leaf.
B There are more stomata on the lower surface of the leaf.
C The leaf is transporting sugar to the lower surface of the leaf.
D Carbon dioxide enters the leaf from the upper surface and oxygen comes out from the lower surface.

I know the answer.......YOU TELL

View All Answers (5)

Ans 1:

SAMRIDDHI from Chirec International School, Hyderabad

Class : Class 4

no b is correct

Ans 2:

SAMRIDDHI from Chirec International School, Hyderabad

Class : Class 4

check solution

Ans 3:

Shreyas from VPEMS, Baramati

Class : Class 4

Ans 4:

SIDDHARTH KUMAR CHATTERJEE from NAVY CHILDREN SCHOOL , CHICALIM

Class : Class 7

D is correct.

Ans 5:

Shreyas from VPEMS, Baramati

Class : Class 4

D should both correct

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Apoorva from Blue Ridge Public School, Pune

Subject :NSO Class : Class 4

Mayank wants to separate a mixture of salt-water-san. Which of these separation methods should he use to separate all the three components?

AFiltration, Distillation
BFiltration, Evaporation
CFlotation, Sedimentation
DEvaporation, Decantation

View All Answers (8)

Ans 1:

VANSH GARG from DPSG, GHAZIABAD

Class : Class 4

why not decantaion and evaporation.

Ans 2:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 8

Evaporation can also differentiate salt and water after removing sand by filtration right? Evaporation will differentiate as salt will stay back and water will evaporate.

Ans 3:

Nishtha maheshwari from Inventure Academy, Bengaluru

Class : Class 3

Ans 4: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

Ans 5:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 8

SOF SOF and master answerPlease give me the answer

Ans 6:

Saarth Agrawal from Podar International School , Mumbai

Class : Class 6

Ans 7:

Ivan Tyagi from Chirec International School , Hyderabad

Class : Class 8

b

Ans 8:

ishaan from BJM carmel Academy, Chandrapur

Class : Class 7

why not decantaion and evaporation.

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riteshnayak from DAV PUBLIC SCHOOL ,MCL,KALINGA AREA, TALCHER

Subject :NSO Class : Class 4

Which of these is INCORRECT about roughage?

A It helps in making blood.
B It helps in repairing the damaged parts of the body.
C It helps the body to get rid of undigested food.
D Both a and b

WHAT IS THE ANSWER

View All Answers (2)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is D.

Ans 2:

SOUMI PAL from DELHI PUBLIC SCHOOL, DURG

Class : Class 6

The right answer is d.

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