The Main Challenge
Using 2, 5 and 6 just once each, with + – × ÷ available, which are the only THREE target numbers from 20-30 inclusive that are mathematically possible to achieve?
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 & 2nd rows contain the following fourteen numbers:
2 8 9 14 15 17 22 28 40 48 55 63 64 72
List THREE different numbers that total 100.
The Roll3Dice Challenge
From six of the seven groups of numbers below, it is possible to make today’s target number of 3 when each number in the group is used once and + – × ÷ is available:
- 1 2 2
- 1 3 6
- 1 4 6
- 2 4 6
- 3 3 4
- 3 4 5
- 4 4 6
Which is the only group that CANNOT make 3?
The Mathematically Possible Challenge
Using 4, 5 and 10 once each, with + – × ÷ available, which FIVE numbers is it possible to make from the list below?
5 10 15 20 25 30 35 40 45 50
#5TimesTable
The Target Challenge
Can you arrive at 3 by inserting 1, 4, 6 and 8 into the gaps on each line?
- ◯+◯+◯–◯ = 3
- (◯×◯)÷(◯×◯) = 3
- (◯+◯)÷◯+◯ = 3
- ◯–(◯÷◯+◯) = 3
- ◯–◯²–◯²÷◯ = 3
Answers can be found here.
Click Paul Godding for details of online maths tuition.
