This Octaplus puzzle challenges you to find the values of eight letters, A to H, from the given information below. Each letter is a different whole number in the range 1-50:
- H is a third of F,
- B is half of F,
- D minus F is either 15 or 16,
- One-seventh of D is a whole number and odd,
- E equals H plus D,
- G equals E minus B,
- C is a fifth of G,
- A is equal to 120 minus the sum of the other seven numbers.
What is the value of each of the eight letters?
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 & 2nd rows of the playing board contain the following fourteen numbers:
2 8 9 14 15 17 22 28 40 48 55 63 64 72
What is the difference between the highest and lowest prime numbers?
Make 5 Challenge
Can you arrive at 5 by inserting 5, 10, 15 and 20 into the gaps on each line?
- (◯÷◯)+(◯÷◯) = 5
- (◯–◯)×◯÷◯ = 5
- ◯–(◯×◯÷◯) = 5
- ◯–(◯–◯)²÷◯ = 5 (there are 2 ways)
- √[(◯×◯÷◯)–◯] = 5
Answers can be found here.
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