Subject :IMO Class : Class 4

Subject :IMO Class : Class 5

## Ans 3:

Class : Class 4

it can be option B but there is an other formula. Add all the digits of all the 4 options. Option A,B,C would be 27 but option D would be 26. That makes the difference between option A,B,C with D. So the answer is option D.

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Subject :IMO Class : Class 6

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Subject :IMO Class : Class 5

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Subject :IMO Class : Class 10

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Subject :IMO Class : Class 6

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Subject :IMO Class : Class 4

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Subject :IMO Class : Class 4

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Subject :IMO Class : Class 7

## Ans 4:

Class : Class 8

the correct answer is B.
there are two small semicircles that form one circle when joined. so after joining it forms 1 circle with a diameter of 14 which means it has a radius of 7.
area= 7*7*(22/7)= 154
in the big semicircle it has a diameter of 28 which means it has a radius of 14.
area = (14*14*22)/(7*2) = 616
area of shaded part = 616-154= 462
thus the correct option is B

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Subject :IMO Class : Class 6