DAY 307:

The Main Challenge

Using the numbers 3, 5 and 7 once each, with + – × ÷ available, list the FIVE even-numbered target numbers from 30-60 inclusive that are mathematically possible to make.

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

What is the sum of the multiples of 8?

The Factors Challenge

Which of the following numbers are factors of 307?

3     5     7     9     11     13     None of them

The Mathematically Possible Challenge

Using 38 and 10 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

30    31    32    33    34    35    36    37    38    39

#NumbersIn30s

The Target Challenge

Can you arrive at 307 by inserting 3, 5, 7, 9 and 11 into the gaps below?

  •  ◯×◯×◯+◯–◯ = 307

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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