Mind Exercise: Brother's Age

Posted by Jerry Lopper Jan 19, 2007

Sharpen your mind and exercise your brain with this number series mind puzzle. Mind and mental exercises such as this mind teaser help to keep your brain young.

Exercise:

My brother is less than 70 years old.

The number of his age is equal to five times the sum of it's digits.

In 9 years the order of the digits of his age now will be reversed.

How old is my brother now?

Solution here:

Source: The Complete Book of Fun Maths, Philip Carter & Ken Russell