Mental Exercise: Number Sequence10

Posted by Jerry Lopper Mar 23, 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.

For more mind related articles see Mind & Attitude in the index.

Exercise:

Replace the ? with the correct answer in this number sequence:

10, 11, 12.1, 13.31, ?

Source: Unknown

Solution Here