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
4x/100=25