DAY 267:

The Main Challenge

Using all four numbers 1, 5, 5 and 10 once each, with + – × ÷ available in each calculation, which even number from 2 to 20 inclusive is impossible to make?

The 7puzzle Challenge

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

The 4th & 6th rows contain the following fourteen numbers:

3   5   10   12   18   20   32   33   35   44   49   54   56   60

What is the sum of the odd numbers?

The Factors Challenge

Which of the following numbers are factors of 267?

3     5     7     9     11     13     None of these

The Mathematically Possible Challenge

Based on our best-selling arithmetic board game.

Using 37 and once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

8    16    24    32    40    48    56    64    72    80

#8TimesTable

The Target Challenge

Can you arrive at 267 by inserting 2, 7, 9, 11 and 13 into the gaps below?

  •  ◯××(◯+◯)–◯ = 267

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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