Instructions
In each of the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
Solution
Starting the sequence with abc. For the next set of terms, we use the original set (i.e abc) after incluing an additional a.
So, the next set of terms becomes aabc.
Similarly for the next set of terms, we add b to the previous term in the right place. Hence it becomes aabbc.
In a similar way, the next set of terms become aabbcc.
So, the final sequence comes out as abcaabcaabbcaabbcca.
