Tricky Age Question

Algebra Level 1

There are two brothers, the older one is 4 years old, and the younger brother is half the age of the older brother. When the older brother gets 100 years old, how old is the younger brother?

90 50 98 45

Anthony Tse by Anthony Tse , 24, Hong Kong

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5 solutions

The older brother is 4 and the younger brother is 2. In 96 years the older one will be 100 y.o. and the younger one 98 y.o.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

Half of four is two so the younger brother must be 2 years shorter

Following 100 - 2 = 98(years)

1 Helpful 1 Interesting 0 Brilliant 1 Confused
Mohammad Khaza
Aug 4, 2017

elder brother is 4 while younger brother is 2.

so, while elder brother is 100 ,younger brother is 98

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Munem Shahriar
Jun 23, 2017

The older brother is 4 4 and the younger brother is 4 × 4 \times 1 2 \dfrac{1}{2} = 2 = 2 years old

The younger brother is 2 2 years younger than the older brother

So, when the older brother is 100 100 years old the younger brother is ( 100 − 2 (100 - 2 ) = 98 = 98 years old.

1 Helpful 0 Interesting 0 Brilliant 0 Confused

The difference in their ages is always 2 2 .

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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