The Main Challenge
Try the following Mathelona challenge by placing the digits 0 1 1 2 3 3 4 4 5 6 7 and 7 into the 12 gaps below and making all three lines work out arithmetically.
◯ + ◯ = 4 = ◯ – ◯
◯ + ◯ = 12 = ◯ × ◯
◯ + ◯ = 1 = ◯ ÷ ◯
Further details of our popular pocket book can be found by clicking Mathelona.
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 1st & 5th columns contain the following fourteen numbers:
8 11 13 14 18 21 22 25 27 44 55 56 60 84
How many pairs of numbers have a difference of 33?
The Factors Challenge
Which is the ONLY number below that is not a factor of 336?
2 3 4 6 7 8 9 12 14 16 21 24
The Mathematically Possible Challenge
Using 2, 9 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?
7 14 21 28 35 42 49 56 63 70
#7TimesTable
The Target Challenge
Can you arrive at 336 by inserting 3, 4, 6, 7 and 8 into the gaps below?
- ◯×◯×√◯×(◯–◯) = 336
Answers can be found here.
Click Paul Godding for details of online maths tuition.
