The Main Challenge
Find the sum of the SEVEN different numbers in the range 65 to 85 that are either multiples of 9, 10, 11 or 12.
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 4th & 6th rows contain the following fourteen numbers:
3 5 10 12 18 20 32 33 35 44 49 54 56 60
What is the difference between the two highest multiples of 3?
The Factors Challenge
Which of the following numbers are factors of 268?
2 4 6 8 10 12 14
[ Hint: Use the ‘bus stop’ method of division to see which of the above numbers divide exactly into 268 ]
The Mathematically Possible Challenge
Based on our best-selling arithmetic board game.
Using 3, 7 and 9 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?
9 18 27 36 45 54 63 72 81 90
#9TimesTable
The Target Challenge
Can you arrive at 268 by inserting 30, 60, 90, 120 and 150 into the gaps below?
- (◯+◯+◯)–(◯÷◯) = 268
Answers can be found here.
Click Paul Godding for details of online maths tuition.
