. . . is to arrive at the target number of 20 by adding together five numbers. You are limited to using digits 1 to 5 but these can be used any number of times in each calculation.
One way of making 20 is 4+4+4+4+4 (you can write your answer as 44444 to save time). Can you list the FIVE other ways in this 5puzzle challenge?
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 5th & 7th rows of the playing board contain the following fourteen numbers:
4 6 7 11 16 21 24 27 30 50 70 77 81 84
What is the sum of the multiples of 7?
. . . can be found when clicking this.