Page 182 - Math Genius C5

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\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

Practice Time 9C

1. Choose the correct option:

( a) 6 years 8 months + 8 years 6 months = ?

( i) 15 years 4 months (ii) 15 years 2 months
( iii) 14 years 8 months (iv) 14 years 4 months

( b) 9 hours 25 minutes – 3 hours 45 minutes = ?

( i) 5 hours 40 minutes (ii) 3 hours 35 minutes
( iii) 4 hours 15 minutes (iv) 4 hours 45 minutes

2. Add the following:

( a) 9 min 28 s and 6 min 16 s (b) 9 h 32 min and 6 h 26 min

( c) 2 days 17 h and 3 days 15 h (d) 5 weeks 4 days and 4 weeks 6 days

( e) 5 years 4 months and 3 years 7 months
3. Subtract the following:

( a) 20 min 48 s from 30 min (b) 15 min 33 s from 18 min 40 s

( c) 8 h 40 min from 24 h (d) 2 days 12 h from 4 days 20 h
( e) 3 weeks 5 days from 5 weeks 3 days (f) 15 years 9 months from 20 years

4. what time will it be:

( a) 3 h 45 min after 8:30 p.m.? (b) 5 h 30 min after 8:40 p.m.?

5. what time was it:

( a) 4 h before 1:30 p.m.? (b) 7 h 25 min before 3:20 p.m.?
6. Find the time interval between 7:25 a.m. and 3:10 p.m.

7. Solve the following word problems.

( a) Shaneya's school starts at 7:45 a.m. and closes at 1:30 p.m. Find the duration of
the school.

( b) A shop opens at 10:30 a.m. and closes at 7:00 p.m. How long does the shop
remain open?

( c) A bus leaves the bus stop at 5:30 a.m. and reaches its destination at 7:45 p.m.
Find the time duration of the journey.
( d) An express train left Vadodara at 4:40 p.m. on Monday and reached Guwahati on
Thursday at 12:30 p.m. Find the total duration of the journey.

( e) Keshav started his job at the age of 23 years 7 months. Now, he is 52 years 2
months old. How long has he been doing this job?

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