Puzzles - Number puzzles
Exercise : Number puzzles
175.
Answer
:
5
Explanation
:
Working in columns, the sum of the numbers in each column equals 18.
176.
Answer
:
16
Explanation
:
Starting on the top left, and moving clockwise in a spiral towards the centre, numbers increase by 7, then decrease by 2. Repeat this pattern all the way around.
177.
Answer
:
10
Explanation
:
Working from left to right numbers follow the sequence of Prime Numbers, subtracting 1 each time.
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