DAY 111:

Today’s Challenge

This describes a particular number less than 100:

  •  its digits add up to 12,
  •  if the unit digit is subtracted from the tens digit and doubled, the answer is also 12.

What is the number?

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 & 4th rows of the playing board contain the following fourteen numbers:

3   10   13   25   32   35   36   42   44   45   54   60   66   80

List THREE different numbers that have a sum of 77.

Make 111 Challenge

Can you arrive at 111 by inserting 2, 3, 5 and 7 into the gaps on both lines?

  •  (◯×◯+◯)×◯ = 111
  •  (◯+◯)²+double(◯×◯) = 111

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 Bookmark the permalink.

Leave a Reply

Your email address will not be published.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

This site uses Akismet to reduce spam. Learn how your comment data is processed.