Question 10

Select the number that DOES NOT belong to the following group.
1, 1, 1.5, 3, 7.5, 22.5, 78.75, 310

Solution

Consecutive multiples of 0.5 are multiplied.

1 $$\times1$$ = 1

1 $$\times1.5$$ = 1.5

1.5 $$\times2$$ = 3

3 $$\times2.5$$ = 7.5

7.5 $$\times3$$ = 22.5

22.5 $$\times3.5$$ = 78.75

78.75 $$\times4$$ = 315

=> Ans - (B)

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