Mental Puzzle: Number Series5

Posted by Jerry Lopper Feb 16, 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:

Examine the following series of numbers and replace the question mark with the correct number:

6, 18, ?, 60, 62, 186, 188

Solution Here:

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