DAY 323:

The Main Challenge

A number puzzle associated with our board game, Mathematically Possible, an excellent resource involving mental arithmetic and strategy. Further details can be found by clicking the link.

Using the numbers 1, 3 and 6 once each, with + – × ÷ available, which one of the following numbers is NOT mathematically possible to make?

2    4    6    8    10    12    15    18    21    24

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 & 7th columns contain the following fourteen numbers:

5   9   13   21   22   24   27   28   32   50   55   56   60   66

Which two numbers become square numbers when 9 is added to them?

The Factors Challenge

Which of the following numbers are factors of 323?

3    5    7    9    11    13    15    17    19    None of them

The Mathematically Possible Challenge

Using 56 and 12 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

5    10    15    20    25    30    35    40    45    50

#5TimesTable

The Target Challenge

Can you arrive at 323 by inserting 2, 3, 3, 4 and 4 into the gaps below?

  •  ◯⁴+◯³+◯²–◯×◯ = 323

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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