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Instructions
In each of the following questions, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
Solution
let the missing term be yÂ
here the given series is 0, 7, 26, 63, yÂ
as we can see that :
0 = 0^2 -1
7 = 2^3 - 1
26 = 3^3 - 1
63 = 4^3 - 1
as we can see that all number are equal to cub of consecutive whole numbers minus 1 and hence ,
y = 5^3 - 1= 124Â
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