National Science Olympiad Forum By SOF Olympiad Trainer - Page 662

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NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi

Subject :NSO Class : Class 4

In the given figures, what fraction of straight lines are vertical lines?

(a)2/11
(b)1/11
(c)3/11
(d)5/11

Ans 1:

ADITYA ROY from VIDYASAGAR SHISHU NIKETAN, MEDINIPUR

Class : Class 5

what is the real answer?

Ans 2:

ARNAV GARG from PRUDENCE SCHOOL, New Delhi

Class : Class 10

Ans 3:

Dheer Pandey from Sentia The Global School, Hyderabad

Class : Class 10

the answer is a.

Ans 4:

Sonu Batra from modern dps faridabad, Faridabad

Class : Class 8

the answer is a . it's simple with the solution

Ans 5:

mahek peswani from jai hind primary school pimpri, pimpri

Class : Class 5

Ans 6:

Tvisha Bindal from Manav Rachna International School Sector 14, Faridabad

Class : Class 4

is simple with the solution

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Nirabhra from bluebells international, New Delhi

Subject :NSO Class : Class 7

Select a figure amongst the options which will continue the series established by the four problem figures.

(a)
(b)
(c)
(d)

Ans 1:

Ishita Gupta from Greenwood High, Bangalore

Class : Class 7

I think the answer is (b)

Ans 2:

Neevedita Singh from Auxilium Convent School Dum Dum, Kolkata

Class : Class 7

its option D

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AKSHITA.KRISHNAN from DPS Noida, Noida

Subject :NSO Class : Class 3

Shikha has 57 pairs of earrings. If she gives 17 pairs to her sister, they will now have the same number of earrings. How many pairs of earrings does Shikha's sister have at first ?

(A) 17

(B) 23

(D) 33

Ans 1:

Pratha Borar from Jayshree Periwal International School, Jaipur

Class : Class 5

(B) 23

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NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi

Subject :NSO Class : Class 4

The given flow chart can be used to distinguish between some types of flowering plants.What do M and N represent in the flow chart?

M N

AHas big flowers Has long stem
BHas edible fruitsHas waxy leaves
CHas woody stem Has spores
DHas edible fruitsFloats inside water

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi

Subject :NSO Class : Class 4

A dog is chasing a cat as shown here.

•The cat starts from 8 m and jumps 3 m every time.
•The dog starts from 5 m and jumps 5 m every time.
If they both start at the same time, in which jump will the dog overtake the cat?

A1
B2
C3
D 4

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

Ans 2:

Dhriti yamana from GEMS Modern Academy, Dubai

Class : Class 4

The answer is c

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NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi

Subject :NSO Class : Class 4

Which of the following metal tumblers will produce the loudest but pleasant sound when struck by a pencil on the sides?

A

B

C

D

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Ans 1:

from Podar International School icse, Aurangabad

Class : Class 6

Ans 2:

ishit from EUROSCHOOL THANE, THANE WEST

Class : Class 7

Can you tell the answer to this question

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Kavita G from sri chaitanya techno school, Bengaluru

Subject :NSO Class : Class 6

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Ans 1:

Shaunak Mahapatra from Mount Litera Zee School, Contai

Class : Class 7

Here opt c is correct as if we add all the digits of the no.s in the opt a , b, and d the result is 29 where opt c gives the result 27. Thus, the odd one is the opt c.

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Nishant Doshi from new era senior secondary school nizampura vadodara, Vadodara

Subject :NSO Class : Class 5

If ‘+’ is called ‘ ÷ ’, ‘–’ is called ‘×’, ‘ ÷ ’ is called ‘+’ and ‘×’ is called ‘–’, then 36 × 12 + 4 ÷ 6 + 2 – 3 =?

A 2
B 18
C
D 42

Give explanation.

View All Answers (21)

Ans 1:

CHEERANJIT MOHANTA from MATHOPE, BHUBANESWAR

Class : Class 5

how? can not understand.

Ans 2:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

I did not write the plus signs . It will be 4 6 , 3 3 and 3 9 .

Ans 3:

Trideev Reddy Maddirevula from IIPS, Riyadh

Class : Class 7

very confusing

Ans 4:

Haroon T K from Silver Hills public school , Calicut

Class : Class 5

Ans 5:

Siddhant Singhania from AGCS purulia, Puruliya

Class : Class 6

Ans 6:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Everyone , pay attention . In this question , the BODMAS rule ( Bracket , Off , Division , Multiplication , Addition , Subtraction ) is used . Let me explain it . First transform all the signs . The ans . comes 36 - 12 -:- 4 6 -:- 2 x 3 . First we have to do division , then multiplication , then addition and then subtraction . Therefore :-36 - 12 -:- 4 6 -:- 2 x 3 \l/36 - 3 3 x 3 \l/ 36 - 3 9 \l/ 36 - 12 \l/ 24

Ans 7:

Shreyansh Gupta from MVN, faridabad

Class : Class 5

not confusing let me explain it so when will we replace the sines it will be like this 36-12 divided by 4 6 divided by 2 multiplied by 3 so when will you solve it you will get the answer

Ans 8:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Ans 9:

Anil sinha from DPS, Chandigarh

Class : Class 4

Ans 10:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA

Class : Class 7

very confusing

Ans 11:

SRISANTH from Edify, Tirupathi

Class : Class 5

The bodmas rule is sometimes not applicable in some cases and if we use both methods it will take about 8 minutes.I even tested it

Ans 12:

Pratyusha Saha from South point school, Kolkata

Class : Class 6

Ans 13:

Sourav Jena from ODM public school , BHUBANESWAR

Class : Class 4

it is confusing ya

Ans 14:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Ans 15:

Irresh Vijay from NPSI Singapore, Singapore

Class : Class 8

Ans 16:

Sohan Choudhury from Delhi Public School Electronic City Bengaluru, Bengaluru

Class : Class 6

Ans 17:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Ans 18:

PARUL GHARSE from Vibgyor, Mumbai

Class : Class 6

it is really confusing

Ans 19:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Ans 20:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram

Class : Class 7

Ans 21:

Dushyant Singh from Shri Ram Centennial School, Indore

Class : Class 6

Very confusing.

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Nishant Doshi from new era senior secondary school nizampura vadodara, Vadodara

Subject :NSO Class : Class 5

Select the correct option regarding natural resources.

A They can never be exhausted.
B They are obtained from soil only.
C Non-mineral resources include air and water.
D Some of the natural resources are harmful to us.

Give explanation

View All Answers (21)

Ans 1:

Diya Avinash from Treamis World School, Bangalore

Class : Class 6

Option C is the correct answer

Ans 2:

Pratham Dave from GNS, Bangalore

Class : Class 7

C is the answer to this question

Ans 3:

Goutham Ram from Lecole' Chempaka International, Trivandrum

Class : Class 5

D is right, take tobacco as an example.

Ans 4:

Arnav kaul from Chirec, Hyderabad

Class : Class 2

Ans 5:

Divyanshi from United international School, Bangalore

Class : Class 6

Therefore lot of correct options.

Ans 6:

AARNA GOEL from UPTON SCHOOL, ENGLAND

Class : Class 5

as per me d

Ans 7:

Kenisha Tamboli from Mansukhbhai Kothari National School, Pune

Class : Class 6

Ans 8:

yuvraj tantia from birla public school, sri ganganagar

Class : Class 5

D is correct

Ans 9:

Arghya Kashyap from Modern Delhi Public School, Faridabad

Class : Class 7

Ans 10:

Ridhan from SFS janakpuri, New Delhi

Class : Class 5

no as per me some resources are harmful like uranium as option d

Ans 11:

Biju Pappachan from Rkc , Raipur

Class : Class 1

C is Correct

Ans 12:

Archit Sanyal from Manav Rachna International , Gurgaon

Class : Class 5

Ytytytytyt it is c c c c c c c c c c c. C cc. C c c c c c

Ans 13:

shaun joel dasari from subs, chennai

Class : Class 5

Ans 14:

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

Class : Class 8

How is C the answer? Water has minerals in it. Pls. explain.

Ans 15:

Sanskriti Nagar from Rose Bud Academy, khagaria

Class : Class 5

Answer is C

Ans 16:

swastik Biswal from St Joseph Convent Higher Secendary school, Sambalpur

Class : Class 5

c correct one pls check it olympiad plz

Ans 17:

Shruthi from VIBGYOR, Mumbai

Class : Class 6

Ans 18:

Rupkatha Bhattacharyya from Ashok hall girls high school, KOLKATA

Class : Class 6

Ans 19:

Ivan Tyagi from Chirec International School , Hyderabad

Class : Class 7

Ans 20:

Syeda Aleeza Zaidi from Somerville school Noida , Noida

Class : Class 5

Ans 21:

Subhang Deep Sahu from Chrysalis High Kadugodi . , Bangalore

Class : Class 7

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j pranav from Dehli Public School Nacharam, Hyderabad

Subject :NSO Class : Class 7

If a body moves with uniform velocity, then

(A) Its initial velocity is zero

(B) Its final velocity is zero

(D) Its change in velocity is zero.

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Ans 1:

arijit paul from New Town School, Kolkata

Class : Class 9

I know this answer........................................its (C) Prove me if its wrong