day/dydd 310 at 7puzzleblog.com

The Main Challenge

Test your knowledge of number combinations by listing the SIX different ways of making 20 when adding together five unique digits from 1 to 9 in this Kakuro-style question.

The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 1st & 3rd rows contain the following fourteen numbers:

2   9   13   14   15   22   25   36   40   42   45   66   72   80

Can you find FIVE sets of three different numbers, all of which have a sum of 100?

The Factors Challenge

Which one of the following numbers is NOT a factor of 310?

1     2     3     5     10     31     62

The Mathematically Possible Challenge

Using 47 and 11 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

4    8    12    16    20    24    28    32    36    40

#4TimesTable

The Target Challenge

Can you arrive at 310 by inserting 1, 2, 3, 4 and 5 into the gaps below?

•  (◯³+◯–◯–◯)×◯ = 310