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Logical Thinking
Mental Maths
1. January 1, 2024 was a Monday. what day of the week was it
on January 26, 2024?
( a) Saturday (b) Friday

( c) Monday (d) Sunday
2. if the day today is Monday, then what will be the day after 63 days?

( a) Monday (b) Tuesday
( c) Wednesday (d) Thursday
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3. A magic show started at 8:45 p.m. its duration was 1 hours. when did the
2
show end?

( a) 10:20 p.m. (b) 10:45 p.m.
( c) 10:15 p.m. (d) 10:25 p.m.

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4. A movie ended at 11:20 p.m. its duration was 2 hours. what time did the
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movie begin if there was a 10-minute intermission break in between?

( a) 2100 hours (b) 2105 hours
( c) 2110 hours (d) 2055 hours

Critical Thinking
Challenge Question
Your mother has told you to finish your glass of milk before going to bed at night. There

are four clocks in your room.
11 12 1 11 12 1 11 12 1 11 12 1
10 2 10 2 10 2 10 2
9 3 9 3 9 3 9 3
8 4 8 4 8 4 8 4
7 6 5 7 6 5 7 6 5 7 6 5

1 hour slow 20 minutes slow 10 minutes fast 2 hours fast
Which clock is showing the appropriate time based on her instruction? At what time
do you go to bed?

Knowledge Desk

Centuries before modern clocks, Indian astronomers built giant observatories Cross-Curricular Learning
called Jantar Mantar in cities like Jaipur and Delhi. These structures are massive architectural
instruments. The largest sundial in the world, the Samrat Yantra in Jaipur, is as tall as a
9-storey building and can measure time with an accuracy of just two seconds! This shows the
incredible skill of ancient Indian mathematicians and engineers in understanding time.

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