How to Increase IQ
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Benefits of Meditation
Mental Math

Riddles and Puzzles
Lateral Thinking

Three Number Puzzles

The first of these puzzles is a classic "arrange and add" puzzle. The second is a "code breaking puzzle" of sorts, and the last is more of an algebra problem. The solutions are at the bottom of the page.

Arrange-and-Add Number Puzzle

Using just one digit in each, place the digits 1 through 9 in the squares in such a way that each vertical, horizontal and diagonal line adds up to 15.


Letters and Numbers


If each of the letter above represents a digit (for example, s = 4, e = 6), which digits would they have to be for the equation to be correct?

Walking Algebra

Jake is walking at 2.5 miles per hour. Bob is trying to catch up, and is walking at 3.5 miles per hour. If Jake had a three hour head start, how long will it take Bob to catch up, and how far will he have walked?






Arrange-and-Add Number Puzzle

  8   3   4
  1   5   9
  6   7   2

Letters and Numbers

+ 1085
= 10652

(s=9, e=5, n=6, d=7, m=1, o=0, r=8, and y=2)

Walking Algebra

Jake has already gone three hours, which at 2.5 miles per hour is 7.5 miles. Since Bob is walking 1 mile per hour faster, it will take him 7.5 hours to catch up. At 3.5 miles per hour, this means he will have walked 26.25 miles.

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Want more puzzles?

You'll find more math puzzles scattered throughout the riddle and puzzle pages. The link below will take you to a listing of these pages.

Riddles and Puzzles


Increase Brainpower Homepage | Number Puzzles