International Maths Olympiad Forum By SOF Olympiad Trainer - Page 647

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Subject :IMO    Class : Class 7

Ans 1:

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

Ans 2:

Class : Class 10

Ans 3:

Class : Class 4

Ans 4:

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 5:

Class : Class 10

Ans 6:

Class : Class 8
the correct answer is c

Ans 7:

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

Ans 8:

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

Ans 9: (Master Answer)

Class : Class 1
The correct answer is A.

Ans 10:

Class : Class 7
C

Ans 11:

Class : Class 7
my answer is d

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Subject :IMO    Class : Class 7

Ans 1:

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

Ans 2:

Class : Class 7
B is correct

Ans 3:

Class : Class 7
Answer B is correct not A

Ans 4:

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

Ans 5:

Class : Class 8
ANSWER B IS ONLY CORRECT

Ans 6:

Class : Class 6
I also think B is correct

Ans 7:

Class : Class 9
i think B is correct answer

Ans 8:

Class : Class 8
B is the correct answer

Ans 9:

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

Ans 10:

Class : Class 7
B IS THE RIGHT ANSWER

Ans 11:

Class : Class 9
Yes B is right

Ans 12:

Class : Class 10
B is correct

Ans 13:

Class : Class 9

Ans 14:

Class : Class 7
B is correct

Ans 15:

Class : Class 9
answer is b

Ans 16:

Class : Class 8
It is B

Ans 17:

Class : Class 8
b is the correct answer

Ans 18:

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

Ans 19:

Class : Class 7

Ans 20:

Class : Class 8
ans is b

Ans 21:

Class : Class 10

Ans 22:

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

Ans 23:

Class : Class 10
B is correct

Ans 24:

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

Ans 25:

Class : Class 7

Ans 26:

Class : Class 7
both a and b are correct.

Ans 27:

Class : Class 9
b is correct

Ans 28:

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

Ans 29:

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

Ans 30:

Class : Class 9
B is correct not A

Ans 31:

Class : Class 7
B is correct not A

Ans 32:

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

Ans 33:

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

Ans 34:

Class : Class 9
It is obviously b.

Ans 35:

Class : Class 10

Ans 36:

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

Ans 37:

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

Ans 38:

Class : Class 6
B is correct answer

Ans 39:

Class : Class 8

Ans 40:

Class : Class 9
the optoins are the same

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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: (Master Answer)

Class : Class 1
The correct answer is D.

Ans 4:

Class : Class 9
Every answer except c is right

Ans 5:

Class : Class 10
how

Ans 6:

Class : Class 10
AAA criterion does not exist

Ans 7:

Class : Class 8
Ans is d

Ans 8:

Class : Class 7
I think (B) is correct

Ans 9:

Class : Class 9
Yes AAA criterion does not exist

Ans 10:

Class : Class 8
Does anyone really know?

Ans 11:

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

Ans 12:

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

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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 8

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7
option a

Ans 5:

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

Ans 6:

Class : Class 7
its option a i guess

Ans 7:

Class : Class 7
option a is correct

Ans 8:

Class : Class 7
THE RIGHT OPTION IS (B)

Ans 9:

Class : Class 10
option b

Ans 10:

Class : Class 6
option C is correct so obvios

Ans 11:

Class : Class 7
its option A I guess

Ans 12:

Class : Class 6
D

Ans 13:

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

Ans 14:

Class : Class 10
sorry option a

Ans 15:

Class : Class 6
it's D

Ans 16:

Class : Class 6

Ans 17:

Class : Class 6
b

Ans 18:

Class : Class 8
right option is C

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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 6
1000

Ans 2:

Class : Class 6
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Ans 3:

Class : Class 3

Ans 4:

Class : Class 8
1000

Ans 5:

Class : Class 8

Ans 6:

Class : Class 6

Ans 7:

Class : Class 6
hellow crazy kids

Ans 8:

Class : Class 4
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000

Ans 9:

Class : Class 4
D

Ans 10:

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

Ans 11:

Class : Class 6
fdsdyugfkojnbklknbvgio

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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

Ans 2:

Class : Class 6
TH ANSWER IS B AGIAN B

Ans 3:

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 4:

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

Ans 5:

Class : Class 6
THE ANSWER IS A NOT B

Ans 6:

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 7:

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

Ans 8:

Class : Class 6
stop fighting

Ans 9:

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 10:

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

Ans 11:

Class : Class 8
Exactly….Archita

Ans 12:

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

Ans 13:

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 14:

Class : Class 8
sorry i meant 4900

Ans 15:

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

Ans 16:

Class : Class 6
A

Ans 17:

Class : Class 9
the ans is 4800

Ans 18:

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 19:

Class : Class 7
Seriously

Ans 20:

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 21:

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

Ans 22:

Class : Class 7

Ans 23:

Class : Class 8

Ans 24:

Class : Class 6

Ans 25:

Class : Class 6
estimate and then subtract

Ans 26:

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

Ans 27:

Class : Class 6
SUBTRACT AND THE ESTIMATE !!!

Ans 28:

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

Ans 29:

Class : Class 6

Ans 30:

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

Ans 31:

Class : Class 5

Ans 32:

Class : Class 6

Ans 33:

Class : Class 7
The answer is A not B

Ans 34:

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

Ans 35:

Class : Class 7
first we should subtract and than estimate

Ans 36:

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

Ans 37:

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 38:

Class : Class 8

Ans 39:

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

Ans 40:

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 41:

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

Ans 42:

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

Ans 43:

Class : Class 6
A

Ans 44:

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

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