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Complete the sequence 1,2,5,10,20

Question asked by: boris123

Asked on: 24 Aug 2009

Not too good on these maths ones, but maybe is it just 40? Because 5 x 2 is 10 and 10 x 2 is 20 so maybe the next is 40. Then again not sure why 5 is there because that's not the answer after all!
By: knowitall
Replied at: 27 Aug 2009
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Comments and other answers:

Knowitall is right. The answer is 40 if you separate the sequence as below : (1, 2),(5,10),(20,?)
By: Michaelmak

Date of comment: Mon, Jun 14th 2010

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