DAY 130:

Today’s Challenge

Can you replace the 12 ◯’s below with the 12 numbers 1, 1, 2, 2, 3, 3, 4, 4, 5, 6, 7 and 8 so that all four equations work out arithmetically?

◯   +   ◯   =   ◯
◯   +   ◯   =   ◯
◯   +   ◯   =   ◯
◯   +   ◯   =   ◯

Click MATHELONA for details of similar 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 2nd & 4th rows of the playing board contain the following fourteen numbers:

3   8   10   17   28   32   35   44   48   54   55   60   63   64

What is the difference between the sum of the multiples of 8 and the sum of the multiples of 7?

Make 130 Challenge

Can you arrive at 130 by inserting 2, 3, 5 and 10 into the gaps on each line?

  •  (◯+◯)×◯×◯ = 130
  •  (◯×◯–◯)×◯ = 130
  •  ◯²+◯²+◯²–◯² = 130

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Your email address will not be published.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 *