International Maths Olympiad Forum By SOF Olympiad Trainer - Page 655

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 5
correct answer is C as 5/6*6/6= 30/36 but resultant fraction will always be 5/6

Ans 2:

Class : Class 4

Ans 3:

Class : Class 7
The correct answer is a because 1/2 < 2/3 < 3/4 < 4/5 < 5/6 < 6/7 < 7/8 < 8/9...

Ans 4:

Class : Class 10

Ans 5:

Class : Class 7
C

Ans 6: (Master Answer)

Class : Class 1
The correct answer is A.

Ans 7:

Class : Class 10

Ans 8:

Class : Class 8
in my opinion both a and c are correct

Ans 9:

Class : Class 7
my answer is d

Ans 10:

Class : Class 8
the correct answer is c

Ans 11:

Class : Class 3
If they tell increase by addition or multiplication , we'll know whether answer is C or A otherwise both answers are right

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 9
Yes B is right

Ans 2:

Class : Class 10
Option b will be correct. This question is there in IMO Workbook and there the answer is b only

Ans 3:

Class : Class 8
The answer b is correct as the order of congruence is different in every potion but b is correct

Ans 4:

Class : Class 8
ANSWER B IS ONLY CORRECT

Ans 5:

Class : Class 7
both a and b are correct.

Ans 6:

Class : Class 10

Ans 7:

Class : Class 10
the optoins are the same

Ans 8:

Class : Class 8
b is the correct answer

Ans 9:

Class : Class 7
Answer B is correct not A

Ans 10:

Class : Class 7
B IS THE RIGHT ANSWER

Ans 11:

Class : Class 7
B is correct not A

Ans 12:

Class : Class 9
b is correct

Ans 13:

Class : Class 6
B is correct and I am gonna support B

Ans 14:

Class : Class 9

Ans 15:

Class : Class 7
B is the correct answer. A cannot be the correct answer as

Ans 16:

Class : Class 9
B is correct not A

Ans 17:

Class : Class 9
I do not think that the correct answer is A

Ans 18:

Class : Class 7
B is correct

Ans 19:

Class : Class 9
It is obviously b.

Ans 20:

Class : Class 8
The correct answer is B. I am sure.

Ans 21:

Class : Class 7

Ans 22:

Class : Class 8
I do not think that the correct answer is A

Ans 23:

Class : Class 9
answer is b

Ans 24:

Class : Class 9
B is the correct answer since, the second portion in option A doesn't satisfy the order

Ans 25:

Class : Class 10
B is correct

Ans 26:

Class : Class 7

Ans 27:

Class : Class 10
According to me, B is the answer....

Ans 28:

Class : Class 8

Ans 29:

Class : Class 8
ans is b

Ans 30:

Class : Class 10
B is correct

Ans 31:

Class : Class 9
i think B is correct answer

Ans 32:

Class : Class 7
Answer is supposed to be B not A

Ans 33:

Class : Class 8
B is the correct answer

Ans 34:

Class : Class 6
I also think B is correct

Ans 35:

Class : Class 8
Option (B) is the correct answer

Ans 36:

Class : Class 8
It is B

Ans 37:

Class : Class 10

Ans 38:

Class : Class 7
B is correct

Ans 39:

Class : Class 6
B is correct answer

Ans 40:

Class : Class 8
yes,B is the correct answer.Not A.

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 8
I think all options are the correct answers

Ans 2:

Class : Class 7

Ans 3:

Class : Class 8
Ans is d

Ans 4:

Class : Class 10
THE CORRECT ANSWER SHOULD BE (B) AS AAA PROPERTY DOESN'T EXIST

Ans 5: (Master Answer)

Class : Class 1
The correct answer is D.

Ans 6:

Class : Class 10
how

Ans 7:

Class : Class 10
AAA criterion does not exist

Ans 8:

Class : Class 8
Does anyone really know?

Ans 9:

Class : Class 9
Every answer except c is right

Ans 10:

Class : Class 7
I think (B) is correct

Ans 11:

Class : Class 7
I think it should be (B)

Ans 12:

Class : Class 9
Yes AAA criterion does not exist

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 6
According to me the correct answer is C]

Ans 2:

Class : Class 6
option C is correct so obvios

Ans 3:

Class : Class 7
its option a i guess

Ans 4:

Class : Class 6
D

Ans 5:

Class : Class 6
According to me the correct answer is C]

Ans 6:

Class : Class 7

Ans 7:

Class : Class 7
THE RIGHT OPTION IS (B)

Ans 8:

Class : Class 8

Ans 9:

Class : Class 6
b

Ans 10:

Class : Class 10
sorry option a

Ans 11:

Class : Class 7
its option A I guess

Ans 12:

Class : Class 7
correct option is D all the options are correct

Ans 13:

Class : Class 7
option a

Ans 14:

Class : Class 8
right option is C

Ans 15:

Class : Class 6
it's D

Ans 16:

Class : Class 10
option b

Ans 17:

Class : Class 7
option a is correct

Ans 18:

Class : Class 6

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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 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

Ans 2:

Class : Class 8
fdsdyugfkojnbklknbvgio

Ans 3:

Class : Class 8

Ans 4:

Class : Class 4

Ans 5:

Class : Class 8
1000

Ans 6:

Class : Class 9
6*200=1200Discount - 200NetPayment = 1000Return Change = 2000-1000=1000

Ans 7:

Class : Class 8
1000

Ans 8:

Class : Class 4
D

Ans 9:

Class : Class 8
hellow crazy kids

Ans 10:

Class : Class 8
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Ans 11:

Class : Class 4
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000

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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 7
first we should subtract and than estimate

Ans 2:

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 3:

Class : Class 7
Seriously

Ans 4:

Class : Class 7
omg seriously? is this a joke?!!

Ans 5:

Class : Class 6
estimate and then subtract

Ans 6:

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

Ans 7:

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 8:

Class : Class 6
A

Ans 9:

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

Ans 10:

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

Ans 11:

Class : Class 7
they told us to round the quotient to nearest tens so the answer is not 16 the answer is 10

Ans 12:

Class : Class 6
SUBTRACT AND THE ESTIMATE !!!

Ans 13:

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

Ans 14:

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 15:

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 16:

Class : Class 8
Exactly….Archita

Ans 17:

Class : Class 7
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 18:

Class : Class 7

Ans 19:

Class : Class 6

Ans 20:

Class : Class 6

Ans 21:

Class : Class 7

Ans 22:

Class : Class 7

Ans 23:

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 24:

Class : Class 8

Ans 25:

Class : Class 7
Answer is A because when you divide 163/14 you get 11. 11 rounded of to the nearest tens is 10

Ans 26:

Class : Class 6
TH ANSWER IS B AGIAN B

Ans 27:

Class : Class 8
sorry i meant 4900

Ans 28:

Class : Class 6

Ans 29:

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

Ans 30:

Class : Class 6
A

Ans 31:

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

Ans 32:

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

Ans 33:

Class : Class 8

Ans 34:

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 35:

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

Ans 36:

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 37:

Class : Class 7
Can any one explain how is the option B 16 correct?

Ans 38:

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

Ans 39:

Class : Class 6
stop fighting

Ans 40:

Class : Class 7
The answer is A not B

Ans 41:

Class : Class 7
THE ANSWER IS A NOT B

Ans 42:

Class : Class 9
the ans is 4800

Ans 43:

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

Ans 44:

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

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