Laurentian Bank of Canada Aptitude Questions and Answers - 1

Question: 1

A clock goes slow from midnight by 5 minutes at the end of the first hour, by 10 minutes at the end of the second hour, by 15 minutes at the end of the third hour and so on. What will be the time by this clock after 6 hours?

(B) 5.15 a.m.

(C) 5.15 a.m.

(D) 5.30 a.m.

Ans: D

Time lost in 1 hour = 5min.

Time lost in 6 hours = (5 × 6) = 30 min.

After 6 hours, the correct time will be 6 a.m. and the clock will show 5.30 a.m.

Question: 2

Between 5 and 6, a lady looked at her watch and mistaking the hour hand for the minute hand, she thought that the time was 57 minutes earlier than the correct time. The correct time was

(A) 12 minutes past 5

(B) 24 minutes past 5

(C) 36 minutes past 5

(D) 48 minutes past 5

Ans: B

Sine, the time read by the lady was 57 minutes earlier than the correct time, so the minute hand is (60 - 57) = 3 minute spaces behind the hour hand.

Now, at 5’O clock, the minute hand is 25 minute spaces behind the hour hand.

To be 3 minutes spaces behind, it must gain (25 - 2) = 22 minute spaces.

55 min. spaces are gained in 60 min.

22 min spaces are gained in $$({60}/{55} × 22)$$ = 24 min.

Hence, the correct time was 24 minutes past 5.

Question: 3

If a clock strikes six times in 5 seconds, the number of strikes in 10 seconds is

(A) 9

(B) 10

(C) 11

(D) 12

Ans: C

There are 5 intervals in 6 strikes.

Number of intervals in 5 seconds = 5.

Number of intervals in 10 seconds = 10.

So, the clock will strike 11 times in 10 seconds.

Question: 4

At 9:38 A.M, through how many degrees the hour hand of a clock moved since noon the previous day?

(A) 612

(B) 649

(C) 720

(D) 740

Ans: B

Time from 12 noon to 9.38 A.M. = 12 hrs + 9 hrs 38 min = 21 hrs 38 min.

= $$21{38}/{60}$$ hrs = $$21{19}/{30}$$ hrs = $${649}/{30}$$ hrs.

Angle traced by the hour hand in 12 hrs = 360°.

Angle traced by the hour hand in $${649}/{30}$$ hrs

= $$({360/12} × {649/30})$$ ° = 649°

Question: 5

How many rotations will the hour hand of a clock complete in 72 hours?

(A) 3

(B) 4

(C) 6

(D) 9

Ans: C

Number of rotations = $${72}/{12}$$ = 6.

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