Question 115

Look at the series : 22, 21, 23, 22, 24, 23 ….. what number should come next ?

Solution

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the sequence is an alternating sequence alternating between subtraction of 1 and addition of 2 and can be rewritten as

22,22-1,21+2,23-1,22+2,24-1 and the next in sequence is 23+2=25

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