DAY 140:

Today’s Challenge

Using the three digits 4, 6 and 9 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

7    14    21    28    35    42    49    56    63    70

#7TimesTable

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 & 7th rows of the playing board contain the following fourteen numbers:

4   6   7   11   16   21   24   27   30   50   70   77   81   84

How many square numbers are listed?

Make 140 Challenge

Can you arrive at 140 by inserting 2, 6, 8 and 10 into the gaps on each line?

  •  ◯²+◯²+◯÷◯ = 140
  •  (◯+◯)²–(◯–◯)² = 140
  •  ◯³+◯²–◯×◯ = 140

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Your email address will not be published.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 *