Which of these English words reads the same on half a turn?
ZOOM, MOW, SWIMS, SIS, NOON.

Hint: In order to find which of these English words read the same on half a turn, we try to understand what the question means by “half a turn”. By half a turn, it means we have to reverse the direction of the word. And then we have to read the words to find out which of them are equal in both ways.

Complete step-by-step answer:
Given Data,
Words – ZOOM, MOW, SWIMS, SIS, NOON

Let us consider all the words, ZOOM, MOW, SWIMS, SIS, NOON
Each distinct alphabet that comprises the given words is:
Z, O, M, W, S, I, N

When reversed these letters become:
Z – Z
O – O
M – M
W – W
S – S
I – I
N – N
All the alphabets give themselves on half a turn or reversed.
So that means the words SIS, NOON give the same on half a turn as they begin and end with the same letter.
Now the words ZOOM, MOW, SWIMS on half a turn give,
ZOOM – MOOZ
MOW – MOW
SWIMS – SWIMS
Therefore except the word ZOOM every other word from the given, gives the same on half a turn.

Hence MOW, SWIMS, SIS, NOON read the same on half a turn.

Note:In order to solve this type of problem the key is to know what the question exactly means, that itself has the answer in it. The most important step in solving this problem is to understand that half a turn of a word means reading the word from backwards. The words which have alphabets in a cyclic order read the same on half a turn.