# DAY/DYDD/GIORNO/NAP 257: T he Main Challenge

In the following multiplication magic square, the numbers in each of the rows, columns and diagonals multiply together to give the same result; 1000.

Two of the numbers have been given to you:

x              x              x

x             10             x

x               1              x

Can you complete the rest of this magic square without repeating any numbers? 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 3rd & 7th rows contain the following fourteen numbers:

4   11   13   24   25   27   30   36   42   45   66   70   77   80

Which three different numbers have a sum of 77? The Factors Challenge

Which of the following numbers, if any, are factors of 257?

3     5     7     9     11     13     None of them The Mathematically Possible Challenge

Using 58 and 11 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

2    3    5    7    11    13    17    19    23    29 The Target Challenge

Can you arrive at 257 by inserting 2, 4, 5, 8 and 9 into the gaps below?

•  ◯²×◯+×(7+◯+◯) = 257   