The Main Challenge
One of our easier Mathelona-style challenges, but still utilising the four arithmetic operations. Place the eight digits 1, 2, 2, 3, 4, 4, 5 and 6 into the gaps so both lines work out:
◯ + ◯ = 6 = ◯ × ◯
◯ – ◯ = 2 = ◯ ÷ ◯
If you enjoy this type of number puzzle, click Mathelona for details of our pocket book of challenges.
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 & 4th rows of the playing board contain the following fourteen numbers:
2 3 9 10 14 15 22 32 35 40 44 54 60 72
What is the difference between the two multiples of 7?
The Mathematically Possible Challenge
Based on our best-selling arithmetic board game.
Using the three digits 2, 6 and 9 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?
4 8 12 16 20 24 28 32 36 40
#4TimesTable
The Target Challenge
Can you arrive at 141 by inserting 3, 5, 7 and 12 into the gaps on each line?
- ◯×(◯+◯)–◯ = 141
- (◯×◯+◯)×◯ = 141
- ◯³+◯+◯–◯ = 141
Answers can be found here.
Click Paul Godding for details of online maths tuition.
