- AU
- BT
- CV
- DS
Step-by-Step Solution
Positions are 1, 3, 6, 10, 15 with gaps +2, +3, +4, +5. The next gap is +6, giving position 21, which is the letter U.
Answer: A) U
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Reasoning & Mental Ability practice questions