Question

What is the next letter number in the given sequence $?$
$\text{A}1$, $\text{C}3$, $\text{E}5$, _______

• A. $\text{F}6$
• B. $\text{G}6$
• C. $\text{F}7$
• D. $\text{G}7$

Answer 1

The correct option is D $\text{G}7$

Given sequence: $\text{A}1$, $\text{C}3$, $\text{E}5$, _______

$\bullet$ Let's solve the numeric sequence first:
$1$, $3$, $5$, _____

By observing the pattern in the above numeric sequence, we find


$\therefore \text{Next numeric term}=\text{Previous numeric term}+2$


Therefore, the next numeric term $=5+2=\underset{–}{7}$.

$\bullet$ Next, we find the numeric sequence corresponding to alphabet sequence $\text{A}$, $\text{C}$, $\text{E}$, _______ by associating it with their place values as shown below.


So, the numeric sequence for $\text{A}$, $\text{C}$, $\text{E}$, _______ is $1$, $3$, $5$, _____, which gives the pattern as

$1+2=3$,
$3+2=5$,
$5+2=\underset{–}{7}$

And, $7$ corresponds to $\underset{–}{\text{G}}$.

$\therefore$ The next letter number in the given alphanumeric sequence
$\text{A}1$, $\text{C}3$, $\text{E}5$, _______ is $\underset{–}{\text{G}7}$.