Instructions

In each of the following questions, choose the correct alternative from the given ones that will complete the series.

Question 168

30, 130, 630, ?

Solution

The series is 030,130,630
The first digit of each term is one more than five times the first digit of the previous term followed by 30.
130 = ((10$$\times$$ 5 +1) 30
630 = ((1 $$\times$$ 5 +1) 30
Hence the term after 630 = ((6 $$\times$$ 5) +1) 30 = 3130.
Hence Option B is the correct answer.

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30, 130, 630, ?

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