100+ Clock Aptitude Questions and Answers - 1

Question: 1

How many times in a day, are the hands of a clock in straight line but opposite in direction?

(A) 20

(B) 22

(C) 24

(D) 48

Ans: B

The hands of a clock point in opposite directions (in the same straight line) 11 times in every 12 hours (Because between 5 and 7 they point in opposite directions at 6 0’clock only).

So, in a day, the hands point in the opposite directions 22 times.

Question: 2

How many times in a day, the hands of a clock are straight?

(A) 22

(B) 24

(C) 44

(D) 48

Ans: C

In 12 hours, the hands coincide or are in opposite directions 22 times.

∴ In 24 hours, the hands coincide or are in opposite direction 44 times a day.

Question: 3

How many times do the hands of a clock coincide in a day?

(A) 20

(B) 21

(C) 22

(D) 24

Ans: C

The hands of a clock coincide 11 times in every 12 hours (since between 11 and 1, they coincide only once i.e., at 12 o’clock).

∴ the hands coincide 22 times in a day.

Question: 4

How many times are the hands of a clock at right angle in a day?

(A) 22

(B) 24

(C) 44

(D) 48

Ans; C

In 12 hours, they are right angles times.

∴ In 24 hours, they are at right angles 44 times.

Question: 5

At what time between 5.30 and 6 will the hands of clock be at right angles?

(A) 40 min. past 5

(B) 45 min. past 5

(C) 43$${5} / {11}$$ min. past 5

(D) 43$${7} / {11}$$ min. past 5

Ans: D

At 5 o’clock, the hands are 25 min. spaces apart.

To be at right angles and that too between 5.30 and 6, the minute hand has to gain (25 + 15) = 40 min. spaces.

55 min. spaces are gained in 60 min.

40 min. spaces are gained in $$({60} / {55} × 40)$$ min. = $$43 {7} / {11}$$ min.

∴ Required time = $$43{7} / {11}$$ min. past 5.

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