Solution #13: An Unusual Series

Each term consists of the first digit of the preceding term multiplied by the second digit of the same term. Thus,

	49 = 7 x 7
	36 = 4 x 9
	18 = 3 x 6

Hence, the fifth term is 1 x 8 = 8.

Source: Longley-Cook, L. H.
Categories: Reasoning, Patterns/sequences

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