National Science Olympiad Forum By SOF Olympiad Trainer - Page 514
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Manvi Mundepi from Montfort School Roorkee, Roorkee
Subject :NSO    Class : Class 6

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Pransh Vashishtha from Chail Public School Chail Chowk, Chail Chowk
Subject :NSO    Class : Class 9

Read the following information carefully.
I. Rahul, Mohit, Rohit, Amit and Karan all collect stamps.
II. Rahul has twice as many as Mohit.
III. Amit and Karan have the same number of stamps.
IV. Rohit has fewer than Amit.
V. Mohit has half as many as Rohit.
On the basis of above informations which one of the following options must be true?

A Rohit and Karan have same number of stamps.
B Mohit has more stamps than Amit.
C Rahul has fewer stamps than Amit.
D Rahul has as many stamps as Mohit.


D is the correct answer please ckeck

Ans 1:

Bhavya Parakh from Modern public School , Bhiwadi
Class : Class 9
D is the correct answer because if we take the number of stamps with Rohit as X then mohit have X/2 (5 statement) and from this Rahul will have X(1st statement) . So Rohit and Rahul have same number of stamps.

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Sourav Jena from ODM public school , BHUBANESWAR
Subject :NSO    Class : Class 5

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kushal from indian school sohar, sohar
Subject :NSO    Class : Class 8

Ans 1:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
should be option c as I can see only 2 pairs

Ans 2:

Sahasra Shanker from KV IIT, Chennai
Class : Class 6
what is the answer? and why

Ans 3:

Anoushka Anbu from Amara Jyoti Public School, Bengaluru
Class : Class 8

Ans 4:

Anoushka Anbu from Amara Jyoti Public School, Bengaluru
Class : Class 8
The 2 pairs are: D

Ans 5:

ICHALKARANJI from dkte, ichalkranji
Class : Class 8
Option D is correct

Ans 6:

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

Ans 7:

VISHNU T M from b, Bengaluru
Class : Class 9
It is 2

Ans 8:

SRIJA SRINIVASAN PAKU from KENDRIYA VIDHYALAYA ASHOK NAGAR, Chennai
Class : Class 8
can someone explain how this question works?

Ans 9:

Hprakash09 from Billabong high Bhopal, Bhopal
Class : Class 7
Shouldn't it be Option C? I can only see 2 pairs, i.e. D/E and R/T.

Ans 10:

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

Ans 11:

Mrudula Achar from Greenwood High, Bangalore
Class : Class 9
Yep it is 2

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Shaurya Suryawanshi from The Orbis school, Pune
Subject :NSO    Class : Class 4

Ans 1:

Shiven Dinkar from DPS Noida, Delhi
Class : Class 4

Ans 2:

Shailaja Divakar from Chennai public school global school, London
Class : Class 6
it is only b. when you read the extra points, they told that Moth balls can damage clothes.

Ans 3:

Abhra Joshi from Global City International School, Bangalore
Class : Class 4

Ans 4:

Sargun Maini from The Khaitan School, NOIDA
Class : Class 6

Ans 5:

k tagore from montessori school, KURNOOL
Class : Class 3
neem leaves are natural things to protect clothes

Ans 6:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 7
its 'd' only

Ans 7:

Yatindra G from SBOA, Chennai
Class : Class 4
Answer is B because neem leaves contain a special substance that kills the insects when they eat it.

Ans 8:

Abhyuday Dutta from DPS NOIDA, Noida
Class : Class 4
I agree with Yatindra and Shailaja. The correct answer is B)

Ans 9:

anu from Haralur, Bengaluru
Class : Class 4

Ans 10:

R SAI HARSHIL from HILLSIDE SCHOOL, Hyderabad
Class : Class 4
shaurya is right

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ELDHO BENOY from St Pauls School, New Delhi
Subject :NSO    Class : Class 6

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Champ from Reliance Foundation School, Mumbai
Subject :NSO    Class : Class 7

Ans 1:

Ishan Patil from D.A.V. B.O.R.L. Public School ,Bina, Bina
Class : Class 9

Ans 2:

Sarthak yadav from RPS, Mahendragarh
Class : Class 9

Ans 3:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
PLS EXPLAIN

Ans 4:

SOMDATTA BHATTACHARYA from Delhi Public School, Dhaligaon, Bongaigaon
Class : Class 5
I DO NOT UNDERSTAND

Ans 5:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
4.186*10*1000=126*10 raised to 4

Ans 6:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7
YOU NEED NOT UNDERSTAND.

Ans 7:

Sarthak yadav from RPS, Mahendragarh
Class : Class 9

Ans 8:

Anika S Kumar from Alphabets International school , Chennai
Class : Class 7
Please explain?

Ans 9:

Shreya Sudarshan from RVK - Banashankari, Bengaluru
Class : Class 7
can a solution be given for the following question

Ans 10:

Sarthak yadav from RPS, Mahendragarh
Class : Class 9

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Trisha Bomanwar from Chirec, Hyderabad
Subject :NSO    Class : Class 3

Ans 1:

Aathrei MS Damodaran from Chrysalis High, Bengaluru
Class : Class 6
How is c the answer ?

Ans 2:

SS from meridian, hyderabad
Class : Class 5
ohhhhhh

Ans 3:

Deshna Singh from Lexicon International, Pune
Class : Class 3
How its answer is D?

Ans 4:

Aarna Agarwal from Manav Rachna International School, Gurgaon
Class : Class 5

Ans 5:

Vivaan Kohli from Greenwood High International School, Bangalore
Class : Class 6
Answer should be A

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NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Subject :NSO    Class : Class 4

Ans 1:

Samaira from Global Indian International School, Bangalore
Class : Class 8
Why have u posted this question on forum if u know the answer????

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The correct answer is C.

Ans 3:

Gayatri Iyer from Sanskriti School, Pune
Class : Class 6
Ans is c only

Ans 4:

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

Ans 5:

Student from School, City
Class : Class 5
Rubber ball has a fixed shape.

Ans 6:

shreyash rawat from podar international school, pune
Class : Class 8
its [c]

Ans 7:

shreyash rawat from podar international school, pune
Class : Class 8

Ans 8:

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

Ans 9:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
C

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Aaryaman Pradhan from De paul School , Berhampur
Subject :NSO    Class : Class 4

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