International Maths Olympiad Forum By SOF Olympiad Trainer - Page 586

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 6

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 6
the ans is 4800

Ans 2:

Class : Class 6
Seriously

Ans 3:

Class : Class 8
7268 - 2427 is in bracket . This means first to do subtraction and then estimate the answer to nearest hundreds ...........TRICKY question

Ans 4:

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 5:

Class : Class 7
it should be 4900 as we estimate first than subtract

Ans 6:

Class : Class 7
first we should subtract and than estimate

Ans 7:

Class : Class 8
As there is a bracket, it means that we have to find the difference and then estimate the number.

Ans 8:

Class : Class 8
The answer must be B)4900 because 7268-2427 = (estimated form) 7300-2400=4900

Ans 9:

Class : Class 9
4900 should be the answer as we have to estimate first

Ans 10:

Class : Class 6
The answer is A not B

Ans 11:

Class : Class 6
it is simple 7268 - 2427 = 4841 rounded to the nearest hundreds = 4800

Ans 12:

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 13:

Class : Class 4
it means first do subtraction and then estemate

Ans 14:

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

Ans 15:

Class : Class 7

Ans 16:

Class : Class 8

Ans 17:

Class : Class 6
estimate and then subtract

Ans 18:

Class : Class 8
guys don't fight people just misunderstood the question also me I got it wrong i put 4800 as i did estimate first then subtract i guess all of us will learn from our mistakes

Ans 19:

Class : Class 6
SUBTRACT AND THE ESTIMATE !!!

Ans 20:

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 21:

Class : Class 7

Ans 22:

Class : Class 8
sorry i meant 4900

Ans 23:

Class : Class 7
We have 7268 – 2427 = 4841 Rounded off 4841 to nearest hundred = 4800

Ans 24:

Class : Class 6

Ans 25:

Class : Class 6
if we apply BODMAS on this question, it says to solve the brackets first...

Ans 26:

Class : Class 10
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 27:

Class : Class 7
Exactly….Archita

Ans 28:

Class : Class 6

Ans 29:

Class : Class 6

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Subject :IMO    Class : Class 8

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 8
The answer made by me was the same.The answer in the book is 57.50

Ans 2:

Class : Class 4
D. 80.5

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Subject :IMO    Class : Class 9

Ans 1:

Class : Class 9
you are taking out average but if you tell you are a girl then you should know the answer

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Subject :IMO    Class : Class 9

Ans 1:

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

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 8
d

Ans 2:

Class : Class 6
The answer for this question is b and not d as boiled egg=20, Sandwich=25 and Parantha=20

Ans 3:

Class : Class 3
B is the correct ans

Ans 4:

Class : Class 5
b

Ans 5:

Class : Class 7
B is the correct answer

Ans 6:

Class : Class 8
d

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 4

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