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Subject :IMO    Class : Class 9

Ans 1:

Class : Class 9
d = 75% of old d ..... => r = 75 %of old r..... volume of sphere =4/3 *pi*r*r*r...... new= 4/3*pi*r*r*r*27/64..... 4/3*pi*r*r*r will cancel out..... volume(new) =27/64 of old, decreased by 37/64, % =37/64*100=3700/64=37*25/16 = 57.81.... therefore answer is opt (D) .....hope you understood!!!!!

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 3
B

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Subject :IMO    Class : Class 4

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Class : Class 6
c

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Class : Class 6
C

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Subject :IMO    Class : Class 4

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Subject :IMO    Class : Class 5

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Class : Class 5

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Class : Class 5
they should learn HCFthe answer is 15 and not 12have not counted another 3

Ans 3:

Class : Class 5
C

Ans 4:

Class : Class 7

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 9
All fruits together = 100% OR x Apples = 30% of x OR 30/100 of x = 3/10 x Oranges= 50% of (x - 3/10 x) OR 1/2 of (x - 3/10 x) = 1/2 of 7/10 x = 7/20 x Pears = 20/20(All Fruits) - {6/20(Apples) + 7/20(Oranges)} = 20/20 - 13/20 = 7/20 Therefore it is clear that 7/20 of all fruits is pears. Hope this was helpful!

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Subject :IMO    Class : Class 3

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Subject :IMO    Class : Class 6

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Subject :IMO    Class : Class 8

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