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Instructions
In each of these questions a number series is given. In each series ‘’only one’’ number is wrong. Find out the ‘’wrong number’’
Solution
$$T_n = T_{n-1}*n + n^2$$
12 = $$4*2 + 2^2$$
45 = $$12*3 + 3^2$$
196 = $$45*4+4^2$$
and so on.
So 42 is the wrong term in the series.
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