Question

Find the term which does not fit into the series given below.
$\text{G4T, J10R, M20P, P43N, S90L}$.

• A. $\text{G4T}$
• B. $\text{J10R}$
• C. $\text{M20P}$
• D. $\text{P43N}$

Answer 1

The correct option is B $\text{J10R}$

The patterns followed by the letters are:
$1^{st}$ letter: $G\stackrel{+3}{\to }J\stackrel{+3}{\to }M\stackrel{+3}{\to }P\stackrel{+3}{\to }S$
$3^{rd}$ letter: $T\stackrel{-2}{\to }R\stackrel{-2}{\to }P\stackrel{-2}{\to }N\stackrel{-2}{\to }L$
The number-series $4,10,20,43,90$ should follow the pattern $\times 2+1,\times 2+2,\times 2+3,\times 2+4.$
So, $10$ is wrong and must be replaced by $(4\times 2+1)$ i.e. $9$.
Thus, the term $\text{J10R}$ does not fit in the given series. The correct term is $\text{J9R}$.

Hence, the answer is (B).