# DAV Class 3 Maths Chapter 6 Brain Teasers Solutions

The  DAV Class 3 Maths Solutions and DAV Class 3 Maths Chapter 6 Brain Teasers Solutions of Day, Date and Time offer comprehensive answers to textbook questions.

## DAV Class 3 Maths Ch 6 Brain Teasers Solutions

Question .
Tick (✓) the correct answer.

(a) There are ________ minutes in three hours.
(i) 120
(ii) 150
(iii) 180
(iv) 60
Solution:
(iii) 180 (3 × 60 = 180 minutes)

(b) Quarter to 8 at night is ________
(i) 8:45 p.m.
(ii) 7:45 a.m.
(iii) 8:15 p.m.
(iv) 7:45 p.m.
Solution:
(iv) 7:45 p.m.

(c) Which of the following shows 1 hour 45 minutes more than the time shown in the clock?

(i) 4 : 00
(ii) 4 : 45
(iii) 3 : 00
(iv) 12 : 15
Solution:
(ii) 4 : 45

(d) I am 8 years now. After 3 yrs my age will be ________
(i) 10 yrs
(ii) 11 yrs
(iii) 12 yrs
(iv) 13 yrs
Solution:
(ii) 11 yrs

(e) If 8th October is Wednesday, then 16th October would be ________
(i) Tuesday
(ii) Saturday
(iii) Sunday
(iv) Thursday
Solution:
Thursday

Question 2.
Write as a.m. or p.m.

(a) 11 : 30 in the morning ________
Solution:
a.m.

(b) Half past 2 in the afternoon ________
Solution:
p.m.

(c) Quarter to 9 at night ________
Solution:
p.m.

(d) 10 minutes to 3 in the afternoon ________
Solution:
p.m.

Question 3.
Fill in the blanks:

(a) There are ________ hours in 4 days.
Solution:
4 × 24 = 96 hrs

(b) At 5 : 50 the hour hand of the clock is between ________ and ________ and minute hand is at ________
Solution:
5, 6 and minute hand is at 10

(c) The shortest month of a year is ________
Solution:
February

(d) If 4th February is Sunday, the day on 18th February will be ________
Solution:
Sunday

(e) If 20th October is Friday, the day on 2nd November will be ________
Solution:
Thursday

Question 4.
How old were you 2 yrs back? After how many years will you be 10 yrs old?
Solution:
6 yrs old, after 2 yrs.

Question 5.
How long does it take? Think of different activities and the time taken by them. Make your table as long as you can. Some examples are given below.
Solution:

 Takes minutes Takes hours 1. Brush teeth. 1. To stitch a frock. 2. Polishing shoes. 2. Cleaning room. 3. Iron the uniform. 3. To meet the relatives. 4. Water the plant. 4. Going to restaurant for dinner.
 Takes days Takes months 1. For a fruit to ripe. 1. To change from summer to winter. 2. Construction in house (small scale) 2. Growth of plant. 3. Designer dress preparation. 3. Hair growth 4. Furniture making 4. Big construction.

Question 6.
Look at your class time table afld find out the following.

(a) How many periods of mathematics are there in a week?
Solution:
6 periods (depend on class time table of school)

(b) What is the duration of each period?
Solution:
30 minutes (depend on class time table of school)

(c) How long is the recess period?
Solution:
30 minutes (depend on class time table of school)

Question 7.
Mehak goes to learn piano during the Vacation. Now study the given clocks carefully. Find out the duration of Mehak’s piano class. (T.B. p.79)

Solution:
Duration of Mehak’s piano class is 1 : 15 to 2 : 35 i.e., 1 hour 20 min.

Additional Questions:

Question 1.
Fill in the blanks

:(a) 4 hours = ______ minutes.
Solution:
4 hours = 240 minutes.

(b) 3 weeks = ______ days.
Solution:
3 weeks = 21 days.

(c) 7 minutes = ______ seconds.
Solution:
7 minutes = 420 seconds.

(d) 4 months = ______ days.
Solution:
4 months = 120 days.

(e) 5 days = ______ hrs.
Solution:
5 days = 120 hrs.

Question 2.
Change:

(i) 7 weeks 4 days to days.
Solution:
7 × 7 + 4
= 49 + 4
= 53 days.

(ii) 9 minutes 30 seconds to seconds.
Solution:
9 × 60 + 30
= 540 + 30
= 570 seconds

(iii) 2 weeks to hours.
Solution:
2 × 7 days
= 14 × 24 hrs
= 336 hrs.

(iv) 8 days to hours.
Solution:
8 days
= 8 × 24
= 192 hrs

(v) 2 hrs 10 min to ____ min.
Solution:
2 hrs 10 min
= 2 × 60 + 10
= 120 + 10
= 130 mins.

Question 3.
Write these dates in the orders in which they came.

(a) 6 August 2004
Solution:
19 December 2002

(b) 10 March 2011
Solution:
6 August 2004

(c) 7 January 2009
Solution:
7 January 2009

(d) 19 December 2002
Solution:
25 May 2010

(e) 25 May 2010
Solution:
10 March 2011

Question 4.
Saurav is 4 yrs older than Raju. Raju was bom in 2009. In which year was Saurav bom?
Solution:
Raju was bom in 2009
Saurav bom 4 yr before Raju.
The year in which Saurav born = 2009 – 4 = 2005
Ans. 2005

Question 5.
Write the time as shown.

(a)

Solution:
10 : 05 (five past 10)

(b)

Solution:
5 : 15 (quarter past 5)

(c)

Solution:
8 : 45 (quarter to 9)

(d)

Solution:
9 : 20 (20 past 9)