(2 votes, average: 4.50 out of 5)Number Puzzle #126
Find missing number in the series 9,19,40,?,170
Check your answer:-
Click here to See SolutionIf we see Tn = 2*Tn-1 + n
T0 = 9
T1 = 2*9 +1 = 19
T2 = 2*19 +2 = 40
T3 = 2*40 + 3 = 83
T4 = 2*83 + 4 = 170
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