Question : Directions: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
ac _ bd _ ce _df _ egh
Option 1: d, f, g, e
Option 2: b, d, c, a
Option 3: d, g, f, e
Option 4: d, e, f, g
Correct Answer: d, e, f, g
Solution : Given:
ac _ bd _ ce _df _ egh
To fill the series we have to divide the series→ac _ / bd _ / ce _ / df _ / egh
Let's check each option –
First option: d, f, g, e; acd / bdf / ceg / dfe / egh. (No repeated pattern has been found.)
Second option: b, d, c, a; acb / bdd / cec / dfa / egh (No repeated pattern has been found.)
Third option: d, g, f, e; acd / bdg / cef / dfe / egh (No repeated pattern has been found.)
Fourth option: d, e, f, g; acd / bde / cef / dfg / egh (Here, 1 is added in the positional value of the first, second, and third letter of each term.)
So, the series is→acdbdecefdfgegh. Hence, the fourth option is correct.