The position of how many letters will remain unchanged if each of the letter in the word ‘JANITOR’ is arranged in English alphabetical order?
- (a)Zero
- (b)Three
- (c)One
- (d)Two
Answer
Why
Correct — A. Write the word out, then write the same seven letters in alphabetical order underneath.
JANITOR gives J A N I T O R
sorted gives A I J N O R T
Rule: a letter counts only if it holds the same numbered place in both rows.
Place by place: 1 is J against A, 2 is A against I, 3 is N against J, 4 is I against N, 5 is T against O, 6 is O against R, 7 is R against T.
Every one of the seven places differs, so the count is zero, which is option (a).
Why the others are wrong
- (b)Three — Three is what N, O and R look like at a glance, because each moves only a single place: N from 3rd to 4th, O from 6th to 5th, R from 7th to 6th. Moving one place is still moving.
- (c)One — One usually rests on R, the last letter of JANITOR. After sorting, the last letter is T, and R slides back to sixth.
- (d)Two — Two confuses order with position. A does come before I in the word and in the alphabet, but A still moves from 2nd to 1st and I from 4th to 2nd.
Concept
These items ask for fixed points: letters holding the same numbered position after the word is rearranged alphabetically. Nothing else counts, not a letter that stays in the same half of the word and not one that keeps its neighbour.
The safe method is mechanical. Write the word, number the places 1 to 7, write the sorted letters underneath, and tick only exact column matches.
Sorting is quicker if you scan the alphabet rather than the word: A first, then I, then J, and so on.
JANITOR has no repeated letters, so the alphabetical order is unambiguous and every comparison is a clean yes or no.
Key facts
- JANITOR sorted alphabetically reads AIJNORT.
- A fixed point is the same letter standing in the same numbered position in both rows.
- No letter of JANITOR is a fixed point, so the answer is zero.
Study next
Common traps
- Counting a letter that shifts by one place as unchanged.
- Sorting by eye and mis-ordering I and J.
- Answering from the look of the word instead of writing both rows out.
Alphabet positions also decide the analogy at Reasoning Q.1, the series at Q.2 and the odd-one-out at Q.13 (9 Sep 2024, 16:00).
Writing positions under the letters is the habit that carries all of them.
Related PYQs
No directly related past PYQ was found.