# Clocks and Calendars Quiz Set 07

### Question 1

If 1st January of an ordinary, non-leap year falls on a Friday, then what will be the day of week on 1st June of that year?

A

Tuesday.

B

Saturday.

C

Wednesday.

D

Thursday.

Soln.
Ans: a

Count the days from months between January 1 and June 1 like this: January days = 31;February days = 28;March days = 31;April days = 30;May days = 31; So total days = 151. Since 151 = 21 X 7 + 4, so excess days are 4. So we can count the day to Friday + 4 = Tuesday.

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### Question 2

Three comets appear in the sky at regular periods of 12, 24 and 36 years respectively. If a comet has passed just now, what is the minimum time that we must wait for a comet to appear in the sky?

A

12 years.

B

37 years.

C

36 years.

D

24 years.

Soln.
Ans: a

The least of the given time periods is 12. So this is the minimum waiting time.

### Question 3

How many degrees does a minute hand sweep in 45 minutes?

A

270°.

B

280°.

C

260°.

D

285°.

Soln.
Ans: a

In 60 mins the angle is 360°. So in 1 min it will sweep by 360/60 = 6°. Therefore in 45 mins it will sweep by 6 x 45 = 270°

### Question 4

Three comets appear in the sky at regular periods of 13, 26 and 39 years respectively. If a comet has passed just now, what is the minimum time that we must wait for a comet to appear in the sky?

A

13 years.

B

40 years.

C

39 years.

D

26 years.

Soln.
Ans: a

The least of the given time periods is 13. So this is the minimum waiting time.

### Question 5

If 1st March of an ordinary, non-leap year falls on a Thursday, then what will be the day of week on 1st August of that year?

A

Wednesday.

B

Monday.

C

Tuesday.

D

Friday.

Soln.
Ans: a

Count the days from months between March 1 and August 1 like this: March days = 31;April days = 30;May days = 31;June days = 30;July days = 31; So total days = 153. Since 153 = 21 X 7 + 6, so excess days are 6. So we can count the day to Thursday + 6 = Wednesday.

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