International Maths Olympiad Forum By SOF Olympiad Trainer - Page 414

# User Forum

Subject :IMO    Class : Class 5

Class : Class 1

Class : Class 5
(D)

Class : Class 9
(D)

Class : Class 1

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Subject :IMO    Class : Class 7

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 5

Class : Class 5

Class : Class 9

Class : Class 9
(A)

Class : Class 6
A

## Ans 5:

Class : Class 5
This was a real brain teaser. I tried it from the right side but not from the left

## Ans 6:

Class : Class 5
I also checked it on the right side but I have to check it from the left side.

Class : Class 9
(A)

Class : Class 6
Answer= (A)

Class : Class 6
a

Class : Class 5
A

## Ans 11:

Class : Class 6
even i tried it from right not left

Class : Class 5
Very easy

Class : Class 5
Answer = A

## Ans 14:

Class : Class 5
omg it was terrefic

Class : Class 5
(A)

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Subject :IMO    Class : Class 4

## Ans 1:

Class : Class 5
C LET NO. OF RED MARBLES = X NO. OF GREEN MARBLES = 5X 5X + X = 1230 X = 205 GREEN MARBLES = 205 X 5 = 1025 Green Marbles removed = 1/5 x 1025 = 205 Left green = 1025 - 205 = 820

Class : Class 5
vah yar

Class : Class 5
Thank you .

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Subject :IMO    Class : Class 8

Class : Class 8
B

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 6

## Ans 1:

Class : Class 8
B: 2, Given number

## Ans 2:

Class : Class 9
suppose the given number is 1 then factor is only 1therefore answer is A:1,given number

## Ans 3:

Class : Class 8
Your thinking is right, but we generally use to say that there are 2 factors of a number. So option B is right

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Subject :IMO    Class : Class 6

Class : Class 8

Class : Class 7

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Subject :IMO    Class : Class 6

Class : Class 7

Class : Class 6

Class : Class 9