DAY 352:

The Main Challenge

Follow the rules below and eliminate every number from a given list, except one.

Firstly, list the multiples of 10 from 10 to 100 inclusive, then eliminate:

  • multiples of 4
  • factors of 100
  • multiples of 3

Which is the only number that remains?

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 6th & 7th columns contain the following fourteen numbers:

5   7   9   24   28   30   32   36   40   49   50   54   64   66

How many multiples of 4 are listed?

The Factors Challenge

Which of the numbers below are factors of 352?

3    4    5    6    7    8    9    10    11    12    None of them

The Mathematically Possible Challenge

Using 13 and once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

1    4    9    16    25    36    49    64    81    100

#SquareNumbers

The Target Challenge

Can you arrive at 352 by inserting 2, 4, 8, 11 and 16 into the gaps on each line?

  •  (◯+◯)×(◯+◯)–◯³ = 352
  •  ◯²×◯×◯×◯÷◯ = 352

Answers can be found here.

Click Paul Godding for details of online maths tuition.

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