International Maths Olympiad Forum By SOF Olympiad Trainer - Page 343

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
I thought that it's in a square shape...……….that is why I did 15 X 15 not 15 X 13....

Ans 2:

Class : Class 6
Answer should be Option B because in the solution the napkin unfolded looks like a square and a square’s all sides are equal so it’s area should be = 15*15= 225 sq.cm .

Ans 3:

Class : Class 7
Thank u Sohan, your answer was very helpful :)

Ans 4:

Class : Class 5
length is 15 and breadth is 13. There was a silly mistake in it.

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
answer is c

Ans 7:

Class : Class 7
C is the answer to this question

Ans 8:

Class : Class 5

Ans 9:

Class : Class 5
thANKS FOOR SOLUTION

Ans 10:

Class : Class 6
thanks. I didn't get the answer at first

Ans 11:

Class : Class 6
Answer = c

Ans 12:

Class : Class 5
Answer: C Explanation: Add all the numbers given their to find the length. It is 9+2+4=15 Unfold the napkin. you will get a number 9 at the left hand side with some space left. you will get a number 4 on the right hand side with some space left. if you imagine this or look at this carefully, you will notice that the space left at the either sides is actually 4 and 9 respctively. so, to find the breadth, add thesess no.-- 9+4=13. So l=151, b=13. Area is being asked. Formula of calculating area of a rectangle: lXb= 15 X 13 = 195 cm'2 Hence, option C is correct.

Ans 13:

Class : Class 8
Thank-you for giving us the solution

Ans 14:

Class : Class 5
I forgot to attempt this question but when I saw this, it appeared a bit difficult to me, but after calculating, I was sure that the answer is C.

Ans 15:

Class : Class 6
Thank you for the solution :)

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Subject :IMO    Class : Class 8

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 9
Yes the question has inadequate information and is wrong

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6
This question does not have enough information.

Ans 4:

Class : Class 8
This question has inadequate information to decide the answer

Ans 5:

Class : Class 8
inadequate info given

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Subject :IMO    Class : Class 5

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Subject :IMO    Class : Class 3

Ans 1:

Class : Class 5
answer is c

Ans 2:

Class : Class 3

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 5

Ans 2:

Class : Class 6
30

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 7
C

Ans 2:

Class : Class 5
C for Correct

Ans 3:

Class : Class 7

Ans 4:

Class : Class 6

Ans 5:

Class : Class 7
pls explain this question

Ans 6:

Class : Class 5
THE CORRECT ANSWER IS OPTION C

Ans 7:

Class : Class 6
C

Ans 8:

Class : Class 7

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 6

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 8

Ans 2:

Class : Class 10
No answer is 2000 sorry

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