Select the option that can replace the question mark (?) in the following series. AH21, CJ18, EL15, GN12, ?
IP9
To find the pattern of the given sequence, the relationship between the letters and numbers is explained below.
Alphabet Pattern:
First letter: $\text{A} \xrightarrow{+2} \text{C} \xrightarrow{+2} \text{E} \xrightarrow{+2} \text{G} \xrightarrow{+2} \text{\textbf{I}}$
Second letter: $\text{H} \xrightarrow{+2} \text{J} \xrightarrow{+2} \text{L} \xrightarrow{+2} \text{N} \xrightarrow{+2} \text{\textbf{P}}$
Number Pattern:
The numbers are decreasing by $3$ in each term: $21 \xrightarrow{-3} 18 \xrightarrow{-3} 15 \xrightarrow{-3} 12 \xrightarrow{-3} \text{\textbf{9}}$
Combining both patterns gives us the next term.
Answer: IP9
Important Questions from Alpha-numeric series
What should come in place of the question mark (?) in the given series based on the English alphabetical order?
DFA, HJE, LNI, PRM, ?What should come in place of the question mark (?) in the given series based on the English alphabetical order?
GEB, JHE, MKH, PNK, ?Which letter-cluster will replace the question mark (?) to complete the given series?
KLHO, LKIN, ?, QFNI, UBRESelect the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
ZY_WZTX_Z_XU_JXTWhat should come in place of the question mark (?) in the given series based on the English alphabetical order?
EGC, IFG, MEK, QDO, ?
