Today’s Challenge
Another number puzzle associated with my board game, Mathematically Possible, an excellent resource involving mental arithmetic and strategy. Further details can be found by clicking the link.
Using the numbers 1, 3 and 6 once each, with + – × ÷ available, which one of the following numbers is NOT mathematically possible to make?
2 4 6 8 10 12 15 18 21 24
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 2nd & 4th columns of the playing board contain the following fourteen numbers:
2 3 6 10 16 20 33 42 45 48 63 70 72 77
Can you find three numbers from the list that have a sum of exactly 100?
Make 325 Challenge
Can you arrive at 325 by inserting 1, 2, 3, 4 and 5 into the gaps on both lines below?
- (◯×◯+◯)×(◯+◯)² = 325
- (◯³+◯)×◯×(◯–◯) = 325
Answers can be found here.
Click Paul Godding for details of online math tuition. Wherever you are in the world, please get in touch.
