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Subject :IMO    Class : Class 7

Ishika and her grandfather both had birthdays last week. The sum of their ages is 100 years. Her grandfather's age is 4 times Ishika's age. How old is Ishika ?

A16 years
B20 years
C22 years
D25 years

how did the answer come 20???

Ans 1:

Class : Class 10
ISHIKA AGE=x GRANDMOTHER AGE=4x TOTAL=5x=100 5x=100 x=100/5 x=20

Ans 2:

Class : Class 7

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