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Number Puzzles
Answer |
6 |
Explanation |
Looking at the diagram in rows, the central circle equals half the sum of the numbers in the other circles to the left and right of the centre. |
Answer |
9 |
Explanation |
The number at the centre of each triangle equals the sum of the lower two numbers minus the top number. |
Answer |
39 |
Explanation |
Working from top to bottom, double each number and subtract 1, then 2, then 3 etc. |
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