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Question
Let's look at a clock again! Solve this one -
The minute hand started from '2'. How many minutes will it take to come back to '2' again?
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Solution
It takes 60 minutes. As it makes one rotation in 60 minutes.
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- How long is your lunch break?
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- Is it the same as all the other periods?
How many minutes can this activity take? Make a guess and then check at home.

Sweeping your room
Ask your father if he can cook as fast as your mother does.
On 15 May 2006 Chandran went to a shop to buy butter. He checked the packet to see if this butter was safe to eat.
It was written on the packet - 'Best before 180 days from the date of packing.'
Then he checked the date of packing. It was 15/01/06.
Help him find out if he should buy this butter or not.
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Which are the other things that come with an expiry date?
Look at this chart. It tells the difference between your watch and a 24-hour clock. Try to complete it.
| Time by your watch (12-hour clock) |
Time by a 24-hour clock |
| 1 o'clock in the afternoon | 13:00 hours |
| 2 o'clock in the afternoon | 14:00 hours |
| 3 o'clock in the afternoon | ______ |
| 3:30 in the afternoon | 15:30 hours |
| 6 o'clock in the evening | ______ |
| 9 o'clock in the evening | ______ |
| 12 o'clock at midnight | ______ |
You must have noted the time of sunrise and sunset.
Write here using am and pm.
| Time of Sunrise | |
| Time of Sunset |



