Here, the terms of the given series are a combination of letters and numerals, which have according to a set pattern.

1)

Find the term which does not fit into the series given below

G4T, J10R, M20P, P43N, S90L


A) G4T

B) J10R

C) M20P

D) P43N

E) S90L

Answer:

Option B

Explanation:

The patterns followed by the letters are :

1st letter : $G+3 \rightarrow J, J+3 \rightarrow M, M+3\rightarrow P, P+3\rightarrow S$

3rd letter : $T-2 \rightarrow R, R-2 \rightarrow P, P-2 \rightarrow N, N-2 \rightarrow L$

The number-series 4, 10, 20, 43, 90 should follow the pattern x2 +1, x2+2, x2+3,  x2+4.

So, 10 is wrong and must be replaced by (4 x 2 + 1) ie., 9.

Thus, the term J10R does not fit in the given series. The correct term is J9R.