DAY 131:

Today’s Challenge

Can you insert the numbers 0 to 9 exactly twice each into the gaps below so all five lines work out arithmetically?

◯  +  ◯   =    15    =   ◯  +  ◯
◯  +  ◯   =     5     =   ◯  –  ◯
◯  +  ◯   =    10    =   ◯  ×  ◯
◯  –  ◯   =     2     =   ◯  ÷  ◯
◯  +  ◯   =     9     =   ◯  ×  ◯

If you enjoyed attempting this tricky puzzle, click this MATHELONA link for details of our slightly easier pocket book challenges.

The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 3rd & 6th rows of the playing board contain the following fourteen numbers:

5   12   13   18   20   25   33   36   42   45   49   56   66   80

What is the sum of the numbers in the forties?

Make 131 Challenge

Can you arrive at 131 by inserting 4, 5, 7 and 9 into the gaps on each line?

  •  ◯×◯×◯–◯ = 131
  •  ◯×◯×√◯+◯ = 131

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

This entry was posted in 7puzzleblog.com. Bookmark the permalink.

Leave a Reply

Your email address will not be published. Required fields are marked *