How to Increase IQ
Brain Exercises

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

SEND
+ MORE
_________
= MONEY

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?

............................

...................

...........

......

Solutions

Arrange-and-Add Number Puzzle

  8   3   4
  1   5   9
  6   7   2

Letters and Numbers

9567
+ 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.


Try my newsletter. It's free and comes with the ebook, How to Have New Ideas. Subscribe right now...

(Sorry, but the newsletter has been discontinued.)


Like what you see here? Please let others know...


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

Copyright


Increase Brainpower Homepage | Number Puzzles