A brain teaser is a form of puzzle that requires thought to solve. It often requires thinking in unconventional ways with given constraints in mind; sometimes it also involves lateral thinking. Logic puzzles and riddles are specific types of brain teasers. Archive of Brain Teasers

*The Brain Teaser: **Scroll Down for your Solution*

**1. **What number is missing from this series?

2 3 5 7 13 17

**2. **What's the pattern to these numbers?

8 5 4 9 1 7 6 3 2 0

**3.** 8998971798998

What is so special about this set of numbers, aside from the fact that it is a palindrome?

Definition of solution - a means of solving a problem or dealing with a difficult situation. Our Free Brain Teaser Newsletter

**1.** 11 Is missing from 2 3 5 7 13 17. The series is of the first prime numbers, and 11 was left out.

**2.** They are in alphabetical order -- eight, five, four, nine, one, seven, six, three, two, zero

**3. **As well as originally being a palindrome, when you add up the individual numbers the answer is also a palindrome [101].