International Maths Olympiad Forum By SOF Olympiad Trainer
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Gireesha from innocent hearts school jalandhar, Jalandhar
Subject :IMO    Class : Class 9

Ans 1: (Master Answer)

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

Post Your Answer

Aditya Singh from Vibgyor Haralur Bangalore, Bangalore
Subject :IMO    Class : Class 3

Ans 1:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 5
1000

Ans 2:

Aditi Shiv Shankar Jaiswal from Delhi Public School Jeddah, Jeddah
Class : Class 4
D

Ans 3:

ayush kumar from dps noida, delhi
Class : Class 3
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Ans 4:

ayush kumar from dps noida, delhi
Class : Class 3
fdsdyugfkojnbklknbvgio

Ans 5:

ayush kumar from dps noida, delhi
Class : Class 3
hellow crazy kids

Ans 6:

ayush kumar from dps noida, delhi
Class : Class 3
1000

Ans 7:

ayush kumar from dps noida, delhi
Class : Class 3

Ans 8:

Ishan Tripathi from Podar International School , Pune
Class : Class 3

Ans 9:

Iraj Singh from DPS Megacity, Kolkata
Class : Class 4
6*200=1200Discount - 200NetPayment = 1000Return Change = 2000-1000=1000

Post Your Answer

Tanmay from DPS Bhopal, Bhopal
Subject :IMO    Class : Class 3

Post Your Answer

from , Bangalore
Subject :IMO    Class : Class 6

Ans 1: (Master Answer)

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

Post Your Answer

Aniksha Anithan from AmaraJyothi Public School, Bangalore
Subject :IMO    Class : Class 6

Ans 1:

Ishitadas from Adamas World school , Ichapur
Class : Class 6

Ans 2:

Pranit Sinha from Montfort School, Roorkee, Haridwar
Class : Class 6
SUBTRACT AND THE ESTIMATE !!!

Ans 3:

Aryan Mahanty from Delhi Public School, bangalore
Class : Class 6
it is simple 7268 - 2427 = 4841 rounded to the nearest hundreds = 4800

Ans 4:

Kavya Gupta from Spring Dale School, Amritsar
Class : Class 7

Ans 5:

Ashwak from Cambridge International School, Saudi Al Dera
Class : Class 7
7268 - 2427 is in bracket . This means first to do subtraction and then estimate the answer to nearest hundreds ...........TRICKY question

Ans 6:

ANUSHA from SATYA PRAKASH PUBLIC SCHOOL, Jabalpur
Class : Class 6
4900 should be the answer as we have to estimate first

Ans 7:

srivats from psbb, chennai
Class : Class 6
because it is in bracket , we must subtract and then we must round off to nearest hundred

Ans 8:

Aryan Nangia from Sun city world school, Gurgaon
Class : Class 6

Ans 9:

Anagha s Karnis from vijaya vittala vidyashala, MYSORE
Class : Class 8
WHAT IS THE USE OF ESTIMATING IF WE ARE DOING THE NORMAL SUBTRACTION. THE ANSWER SHOULD BE 4900 AS THE NUMBER 7268 ESTIMATED TO THE NEAREST IS 7300 AND THEE NUMBER 2427 ESTIMATED TO THE NEAREST HUNDRED IS 2400. 7300-2400=4900

Ans 10:

Aayushi from Best English school, Ahmedabad
Class : Class 6

Ans 11:

Carrie Goyal from OPBMS, Mandi Gobindgarh
Class : Class 7
first we will do subtraction of 7268 and 2427 that is 4841 then we will estimate 4841 by nearest 100 which is 4800 and the anser is this first i have also done it according to NCERT but when result came then it was this solution

Ans 12:

anjanikhairwar@gmail.com from S.V.K.M. J.V. PAREKH INTERNATIONAL SCHOOL, Mumbai
Class : Class 4
it means first do subtraction and then estemate

Ans 13:

SKIyer from CNS, Mumbai
Class : Class 6
estimate and then subtract

Ans 14:

Archita from PSBB, Chennai
Class : Class 7
What is the point in estimating if we are anyway doing the actual subtraction? It makes sense if we round off the numbers 7268 and 2427 to the nearest hundred and then subtract, but that gives 7300-2400 viz.4900

Ans 15:

Kanav Dhingra from DPS sec45, Gurgaon
Class : Class 6
if we apply BODMAS on this question, it says to solve the brackets first...

Ans 16:

Omkar Deshmukh from phoenix greens international school, Hyderabad
Class : Class 7
it should be 4900 as we estimate first than subtract

Ans 17:

DHEER PANDEY from Sentia School, Hyderabad
Class : Class 7
It generally mentioned clearly what to do first, the actual subtraction or the estimation by SOF. But here, they asked us to estimate 7268-2427. So,we should first do the actual subtraction. By that the answer is 4800.

Ans 18:

Omkar Deshmukh from phoenix greens international school, Hyderabad
Class : Class 7

Post Your Answer

Aditya Garg from Mayura School, Jaipur
Subject :IMO    Class : Class 8

Post Your Answer

Saumya Samridhi from DELHI PUBLIC SCHOOL, Gurgaon
Subject :IMO    Class : Class 4

Ans 1:

Ashveera Khan from Army Public School Bolarum, Secunderabad
Class : Class 4
D. 80.5

Ans 2:

Saumya Samridhi from DELHI PUBLIC SCHOOL, Gurgaon
Class : Class 7
The answer made by me was the same.The answer in the book is 57.50

Post Your Answer

Priyanshu from S. D. Memorial Sr. Sec. School, Gurgaon
Subject :IMO    Class : Class 9

Ans 1:

rishab.ghai from The Mother's International School, delhi
Class : Class 9
you are taking out average but if you tell you are a girl then you should know the answer

Post Your Answer

Priyanshu from S. D. Memorial Sr. Sec. School, Gurgaon
Subject :IMO    Class : Class 9

Ans 1:

from , Gwalior
Class : Class 10
1:2 because lets take no. of boys as x then 70x will be total marks of boys lets take girls as y then 73y will be no of total marks of girls then 71x+71y will be equal to the total marks of whole class then we can say that 70x+73y=71x+71y it gives us x=2y so ratio will be 1:2

Post Your Answer

Deoxys from vishwa bharati public school , Noida
Subject :IMO    Class : Class 5

Ans 1:

Amal Amzath Ali from jss international school, Dubai
Class : Class 5
b

Ans 2:

Ishita Sinha from Amanora school, Pune
Class : Class 7
d

Ans 3:

Ishita Sinha from Amanora school, Pune
Class : Class 7
d

Ans 4:

Nivin from Euro school, BANGALORE
Class : Class 3
B is the correct ans

Post Your Answer