Select the number that can replace the question mark (?) in the following series.
40, 44, 22, 26, 13, ?
Given series  40, 44, 22, 26, 13,?Â
the given series follow pattern follow  increase 4 and divide by 2Â
thenÂ
40 +4 = 44 , $$44\div 2 = 22 $$, 22 + 4 = 26, $$26\div 2 = 13 $$Â
therefore ? = 13 +4Â = 17 AnsÂ
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