day/dydd 273 at 7puzzleblog.com

The Main Challenge

Starting with the number 70, keep on subtracting consecutive prime numbers from the previous total (2, 3, 5, ) until your answer first becomes negative. What is this negative number?

The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from up to 84.

The 2nd & 7th rows contain the following fourteen numbers:

4   8   11   17   24   27   28   30   48   55   63   64   70   77

What is the sum of the multiples of 6?

The Factors Challenge

Which of the following numbers are factors of 273?

3     5     7     9     11     13     None of them

The Mathematically Possible Challenge

Using 37 and once each, with + – × ÷ available, which are the only THREE 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 273 by inserting 1, 3, 5, 7 and 9 into the gaps below?

  •  (◯+◯–◯)×◯×◯ = 273

Answers can be found here.

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