Question

in which of the following patterns the next number is found by doubling the number before it
(a) 5, 10, 15, 20,
(b) 5, 10, 20, 40,
(c) 5, 7, 9, 11,...
(d) 5,9,13, 17,


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Answer 1

(b) 5, 10, 20, 40,

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