DAY 350: The Main Challenge

This involves one of our favourite puzzles, Kakuro, which is all about addition and number combinations. Your task is to find different ways of making 29 when adding together six UNIQUE digits from 1-9.

One such way is 9+8+6+3+2+1; can you list the other SEVEN ways? 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 4th & 5th columns contain the following fourteen numbers:

3   6   8   11   14   18   20   25   42   44   63   72   77   84

Which two numbers add to make a square number greater than 100? The Factors Challenge

Which of the numbers below are factors of 350?

5    10    15    20    25    30    35    40    45    50 The Mathematically Possible Challenge

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

9    18    27    36    45    54    63    72    81    90

#9TimesTable The Target Challenge

Can you arrive at 350 by inserting 10, 20, 30, 40 and 50 into the gaps below?

•  ◯×(◯+◯)÷(◯–◯) = 350   