393
Q:

# 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

Explanation:

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 o'clcok only).

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

Subject: Clock puzzles
Q:

1 Billion Seconds Equals to

 A) 34.76 years B) 32.48 years C) 33.31 years D) 31.68 years

Explanation:

We know that 1 year = 365.25 days

1 day = 24 hours

1 hour = 60 minutes

1 minute = 60 seconds

=> 1 Year = 365.25 x 24 x 60 x 60 Seconds

But 1 billion seconds = ?

1 Year = 365.25 x 24 x 60 x 60 Seconds

?     =  1000000000 Seconds

= 31. 68 years.

23 2088
Q:

Find at what time between 9 and 10 o’clock will the hands of a clock be in 180° ?

 A) 180/14 min past 10 B) 180/11 min past 9 C) 148/7 min past 10 D) 154/11 min past 9

Explanation:

At 9 o’clock, the hour hand is at 9 and the minutes hand is at 12, i.e., the two hands are 15 min. spaces apart.
So, the minute hand should gain = (30 - 15) minutes = 15 minutes
55 minutes will be gained in 60 min.
15 minutes spaces will be gained in ((60/55) x 15) min. = 180/11 min.
The hands will be in the same straight line but not together i.e.,in 180 degrees at 180/11 min. past 9.

Filed Under: Clock puzzles
Exam Prep: Bank Exams , CAT , GATE , GRE
Job Role: Bank Clerk , Bank PO

25 5153
Q:

Minute hand overlaps hour hand in 65 mins. In how many days it will gain 1440 hours ?

 A) 57 days B) 58 days C) 60 days D) 61 days

Explanation:

In this problem , it has considered that 65 mins = 1hr
So mins has increased by 5 mins so multiply 5 x 24 = 120 mins extra ,
That is now per day it adds 2hr extra, so divide 1440/26 = 59.384 days =~ 60 days.

Filed Under: Clock puzzles
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

23 3307
Q:

How many minutes is it until 6 o'clock if 50 minutes ago it was 4 times as many minutes past 3 o'clock ?

 A) 26 min B) 24 min C) 22 min D) 20 min

Explanation:

Let the required number of minutes = M
Total minutes between 3o'clock and 6o' clock = 180 minutes
M + 50 + 4M = 180
5M + 50 = 180
5M = 130
M = 26 minutes.

Filed Under: Clock puzzles
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

9 2362
Q:

The reflex angle between the hands of a clock at 11:35 is ?

 A) 137.5 degrees B) 222.5 degrees C) 192.5 degrees D) 330 degrees

Explanation:

Apply the formula for finding the angle:
Angle=(30h-(11/2)m( where m stands for minutes and h stands for hours)
Hence, 30x11 - 11/2x35 = 330 - 192.5 = 137.5 degrees
The reflex angle = 360 - 192.5 degree = 222.5 degrees.

Filed Under: Clock puzzles
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

15 4079
Q:

There is a clock which shows false timing ie it shows 20 minutes less for each 1 hour. If the clock shows 12 noon now how many minutes will be lost when it shows 2 pm ?

 A) 36 minutes B) 48 minutes C) 35 minutes D) 60 minutes

Explanation:

For 1 hour, 20 minutes is slower, then for
06 miuntes - 2 minutes is slower
30 minutes - 10 minutes
Actual time | false time
12 12
01 PM 12:40 PM (20 minutes slower)
02 PM 01:20 PM
03 PM 02:00 PM

So, when actual time is 3pm, the false time is 2 pm.
So, it loses 60 minutes when it shows 2 pm.

Filed Under: Clock puzzles
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
Job Role: Bank Clerk , Bank PO

10 1887
Q:

At what time between 2 and 3 O'clock, the hands of a clock coincide ?

 A) 1 10/11 minutes past 2 B) 1 10/11 minutes past 3 C) 1 11/10 minutes past 3 D) 11 10/11 minutes past 2

Explanation:

Since, in one hour, two hands of a clock coincide only once, so, there will be value.
Required time  minutes past H.
Here H - initial position of hour hand = 2 (since 2 O'clock)
A° = Required angle = 0° (Since it coincides)

minutes past 2

=> $11011$ minutes past 2

Filed Under: Clock puzzles
Exam Prep: GRE , GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

16 5176
Q:

A clock is started at 11 a.m. By 600 seconds past 6 p.m, the hour hand has turned through ?

 A) 155 degrees B) 175 degrees C) 205 degrees D) 215 degrees

Explanation:

The total angle traced by the hour hand is the angle traced in 7 hours and 10 minutes.
We know that the angle traced by the hour hand in one hour is 30º and in one minute is 1/2º.
Therefore, (30º x 7) + (10 x 1/2º) = 215º is the angle traced by the hour hand.