Instructions
What should come in place of question mark (?) in the given number series ?
Solution
Let the missing number be y
here the pattern is
5 - 8 = -3
4 - 5 = -1
7 - 4 = 3
18 - 7 = 11
y - 18 = m .......(1)
Now as we can see that the difference between consecutive terms of this series is increasing by $$(2)^n$$, i.e
-1 - (-3) = 2
3 - (-1) = 4
11 - 3 = 8
m - 11 = 16 .....(2)
From 1 and 2
y = 45
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