Today’s Challenge
The smallest positive integer that has exactly three factors is FOUR; these are 1, 2 and 4. When finding the next integer to have just three factors, what is the product of these three numbers?
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 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
What is the sum of the multiples of 10?
Make 46 Challenge
Can you arrive at 46 by inserting 3, 4, 5 and 9 into the gaps on each line?
- (◯+◯)×◯+◯ = 46
- ◯²+◯×◯+◯ = 46
- ◯×◯+◯–√◯ = 46
Answers can be found here.
Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.
