Today’s Challenge
Three UNIQUE digits from 1-9 must be used to arrive at a specified target number, today it is 19.
The formula is simple – multiply two numbers together, then either add or subtract the third number to achieve your goal. The three numbers used each time must be different.
One way to make 19 is (7×2)+5, can you find the other THIRTEEN ways?
[Note: (7×2)+5 = 19 and (2×7)+5 = 19 counts as just ONE way.]
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 3rd & 6th rows of the playing board contain the following fourteen numbers:
5 12 13 18 20 25 33 36 42 45 49 56 66 80
What is the sum of the multiples of 5 listed above?
Make 239 Challenge
Can you arrive at 239 by inserting 1, 2, 3, 8 and 9 into the gaps below?
(◯–◯)²×(◯–◯)+◯–7 = 239
Answers can be found here.
Click Paul Godding for details of online math tuition. Wherever you are in the world, please get in touch.
