Today’s Challenge
If you multiply a mystery number by 6 and then subtract 6, the result is the same as if you first multiplied the same mystery number by 3 and then added 3.
Is the value of this mystery number 1, 2, 3, 4 or 5?
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 & 4th rows of the playing board contain the following fourteen numbers:
3 10 13 25 32 35 36 42 44 45 54 60 66 80
From the list, what is the sum of the multiples of 7?
Make 112 Challenge
Can you arrive at 112 by inserting 3, 5, 10 and 11 into the gaps on both lines?
- ◯×◯+◯–◯ = 112
- (◯+◯)×(◯–◯) = 112
Answers can be found here.
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