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\ 19-Nov-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

Mental Maths

Choose the correct option. 21 st
Century #Critical Thinking
Skills
1. 9:15 p.m. in the 24-hour clock is:
a. 21:15 hours b. 20:15 hours c. 18:15 hours d. 23:15 hours
2. The time 3:30 hours before 2:20 p.m. is:

a. 10 : 30 a.m. b. 10 : 40 a.m. c. 10 : 50 p.m. d. 10 : 50 a.m.

3. 6 years 8 months + 8 years 6 months = ?
a. 15 years 4 months b. 15 years 2 months

c. 14 years 8 months d. 14 years 4 months

4. 9 hours 25 minutes – 3 hours 45 minutes = ?
a. 5 h 40 min b. 3 h 35 min c. 4 h 15 min d. 4 h 45 min

Fun Activity 21 st

Century #Creativity
Skills
Make a table of activities you do in a day. For each activity—such as sleeping, eating,

playing, studying, or doing other things—note the time you start and finish. Then,
prepare two schedules: one for a weekday and one for a weekend. Compare them to
see how your time is spent differently on weekdays and weekends.

Activity Weekday Weekday Weekend Weekend Difference
Start end Start end of Duration
Sleeping
Breakfast
Getting ready
School/Study
Lunch

Play/Relax
Homework
Dinner
Free time/TV
Family time
Meeting with
friends/relatives

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Time