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Mathematics for IGCSE & O level - Sequences (Section 1 - No. 7)

Which of these is the next two terms of this sequence: 3, 7, 11, 15, ...?
19, 23
18, 22
17, 19
20, 24

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The rule is +4. Adding 4 to 15 gives 19, and adding 4 to 19 gives 23.

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