Today’s Challenge
. . . is a number trail involving ten arithmetical steps. You can time yourself, but more importantly be careful with your calculations. No calculators please!
Start with the number 40, then:
- multiply by 4
- +10%
- subtract 15
- divide by seven
- add nine
- 1/2 of this
- +87
- double this
- –96
- ÷10
What is your final answer?
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 & 4th columns of the playing board contain the following fourteen numbers:
3 6 13 20 21 22 27 42 55 56 60 63 72 77
What is the product of the highest number and lowest number?
Make 330 Challenge
Can you arrive at 330 by inserting 3, 5, 10, 11 and 15 into the gaps below?
◯×◯×(◯–◯–◯) = 330
Answers can be found here.
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