International Maths Olympiad Forum By SOF Olympiad Trainer - Page 647

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Subject :IMO    Class : Class 9

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 8
6*200=1200Discount - 200NetPayment = 1000Return Change = 2000-1000=1000

Ans 2:

Class : Class 3

Ans 3:

Class : Class 6
fdsdyugfkojnbklknbvgio

Ans 4:

Class : Class 4
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000

Ans 5:

Class : Class 4
D

Ans 6:

Class : Class 6
hellow crazy kids

Ans 7:

Class : Class 6

Ans 8:

Class : Class 6
1000

Ans 9:

Class : Class 6
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Ans 10:

Class : Class 8
1000

Ans 11:

Class : Class 8

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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 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 2:

Class : Class 6
SUBTRACT AND THE ESTIMATE !!!

Ans 3:

Class : Class 9
the ans is 4800

Ans 4:

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 5:

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

Ans 6:

Class : Class 6
B is not correct it is 10 as when we divide the quetiont results in 11 and when we round that of we will get 10

Ans 7:

Class : Class 7
first we should subtract and than estimate

Ans 8:

Class : Class 6
Can any one explain how is the option B 16 correct?

Ans 9:

Class : Class 7
The answer is A not B

Ans 10:

Class : Class 6
TH ANSWER IS B AGIAN B

Ans 11:

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 12:

Class : Class 6

Ans 13:

Class : Class 6
stop fighting

Ans 14:

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 15:

Class : Class 9
The answer must be B)4900 because 7268-2427 = (estimated form) 7300-2400=4900

Ans 16:

Class : Class 7

Ans 17:

Class : Class 6

Ans 18:

Class : Class 8
sorry i meant 4900

Ans 19:

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

Ans 20:

Class : Class 7

Ans 21:

Class : Class 9
7268 - 2427 is in bracket . This means first to do subtraction and then estimate the answer to nearest hundreds ...........TRICKY question

Ans 22:

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

Ans 23:

Class : Class 7

Ans 24:

Class : Class 5

Ans 25:

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

Ans 26:

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 27:

Class : Class 8
Exactly….Archita

Ans 28:

Class : Class 6
estimate and then subtract

Ans 29:

Class : Class 6
Shreyansh is correct there is no 4800 or anything else,Btw the answer is (a) 10 not (b) 16!!!!

Ans 30:

Class : Class 6
THE ANSWER IS A NOT B

Ans 31:

Class : Class 6

Ans 32:

Class : Class 10
4900 should be the answer as we have to estimate first

Ans 33:

Class : Class 6
omg seriously? is this a joke?!!

Ans 34:

Class : Class 6
A

Ans 35:

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

Ans 36:

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

Ans 37:

Class : Class 8

Ans 38:

Class : Class 7
Seriously

Ans 39:

Class : Class 10
if we apply BODMAS on this question, it says to solve the brackets first...

Ans 40:

Class : Class 6
they told us to round the quotient to nearest tens so the answer is not 16 the answer is 10

Ans 41:

Class : Class 6
bruh of which question are u all talking about there is not a option of 4800,4900... i think the answer should be 10 but its showing b how?

Ans 42:

Class : Class 6
A

Ans 43:

Class : Class 6
THERE IS NO ANSWER 4900,4800 BLAH BLAH BRUH !!!!!!!

Ans 44:

Class : Class 5
Answer is A because when you divide 163/14 you get 11. 11 rounded of to the nearest tens is 10

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Subject :IMO    Class : Class 8

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 4
D. 80.5

Ans 2:

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

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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 8
The answer for this question is b and not d as boiled egg=20, Sandwich=25 and Parantha=20

Ans 3:

Class : Class 8
d

Ans 4:

Class : Class 5
b

Ans 5:

Class : Class 3
B is the correct ans

Ans 6:

Class : Class 7
B is the correct answer

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