Counting from the right — Aptitude Question
Counting from the right: Which is the seventh letter from the right in the English alphabet? Answer and worked solution on CodeKairo.
- Topic: Coding & Decoding
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 50 seconds
Question
Which is the seventh letter from the right in the English alphabet?
Options
- S
- T
- U
- V
Show the answer and the worked solution
Correct answer: B. T
Worked solution
- The nth letter from the right is the (27 − n)th from the left.
- 27 − 7 = 20, which is T.
Answer: T.
The idea
The formula 27 − n converts right-counts to left-counts. Counting backwards from Z by hand is slower and easy to slip on.
Shortcut. The 7th from the right sits six places back from Z: 26 − 6 = 20, and 20 is T by the EJOTY anchors (E 5, J 10, O 15, T 20, Y 25).
Common trap. "S" — computing 26 − 7 = 19; Z itself is the first letter from the right, so the 7th is only six places back from it.