DAY 116:

Today’s Challenge

All of the following 3-digit numbers are divisible by 3, but only one is a also a multiple of 9. Which one is it?

237  276  303  336  495  528  582  660  744  771  888  939

[Note: Get in touch if you don’t know the quick trick to find this out.]

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 5th & 6th rows of the playing board contain the following fourteen numbers:

5   6   7   12   16   18   20   21   33   49   50   56   81   84

What is the difference between the highest and lowest multiples of 7?

Make 116 Challenge

Can you arrive at 116 by inserting 2, 3, 4 and 9 into the gaps on each line?

  •  (◯×◯+◯)×◯ = 116
  •  ◯³+◯²+◯²³ = 116
  •  ◯³×◯(◯+◯) = 116

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Your email address will not be published.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 *