DAY 353:

The Main Challenge

Using each of the four numbers 0.5, 0.5, 10 and 12 once each, with the four arithmetical operations + – × ÷ available, can you arrive at the target answer of 7?

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 more square numbers than prime numbers are listed above?

The Factors Challenge

Which of the numbers below are factors of 353?

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 SIX numbers is it possible to make from the list below?

2    3    5    7    11    13    17    19    23    29

#PrimeNumbers

The Target Challenge

Can you arrive at 353 by inserting 5, 6, 7, 9 and 16 into the gaps below?

  •  ◯×◯×(◯–◯)+√◯ = 353

Answers can be found here.

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