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The pattern can best be found by tabulating the figures in groups of three.

The first number in each group = n, the second = n + 1, and the third = n + 3.

1. 2. 4.

Add 6

7. 8. 10

Add 18 (3 x 6)

25.26.28

Add 54 (3 x 18)

79.80.82

So the next number as required is 80.

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14y ago

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