What should come in place of the question mark (?) in the following number series?
1548 516 129 43 ?
Correct Answer: Option B
The pattern that the series is following can be shown easily in a diagram:
\(1548\mathop \to \limits^{ \div 3} 516\mathop \to \limits^{ \div 4} 129\mathop \to \limits^{ \div 3} 43\)
The above diagram means a term is divided by either 3 or 4 to get the next term.
For example, 1548 when divided by 3 we get, 516.
The divisor is oscillating between 3 & 4 in a manner like first 3 then 4 then again 3 then 4 and so on. That means to get the unknown term we have to divide 43 by 4. Because the previous operation was division by 3.
∴ The unknown term is 43 ÷ 4 = 10.75
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