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Mathematics for IGCSE & O level - Sequences (Section 1 - No. 14)

Which sequence is described by the term-to-term rule of 'subtract 5'?
10, 15, 20, 25,...
25, 20, 15, 10,...
5, 10, 15, 20,...
10, 20, 30, 40,...

説明

The sequence decreases by 5.

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