DAY 358:

The Main Challenge

The American maths card game, 24game, can be both frustrating and addictive.

Your task is to arrive at the target answer of 24 by using the four digits shown in each of the three groups below, just once each per calculation.  You also have + – × ÷ available to use.

It is possible to reach 24 with two of them, but one group is impossible. Which one?

  •   2    3    3    4
  •   2    3    3    5
  •   2    3    3    6

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 column contains the following seven numbers:

13     21     22     27     55     56     60

Using all seven numbers exactly once each, with + – × ÷ available to use in your calculation, can you arrive at the target number of 100?

The Factors Challenge

Which of the numbers below are factors of 358?

4    6    8    10    12    14    16    18    None of them

The Mathematically Possible Challenge

Using 48 and 12 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?

6    12    18    24    30    36    42    48    54    60

#6TimesTable

The Target Challenge

Can you arrive at 358 by inserting 1, 2, 3, 4 and 6 into the gaps below?

  •  ◯⁵+◯⁴+◯³+◯²–◯ = 358

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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