# NCERT Class 4 Maths Chapter 4 Tik Tik Tik

### Tik Tik Tik

NCERT book Page No: 36

Question: 1

Three friends read time from a clock. Who is right?

In the first clock, the hour hand is at 3 and the minute hand is at 12. This means it is 3 O’clock. Here Pinki is right

In the second clock, the hour hand has passed 5 and the minute hand is at 7. So, the time is 5: 35. Pinki is right.

In the third clock, the hour hand is at 7 and the minute hand is at 3. Hence, the time is 7: 15. Once again Pinki is right.

NCERT book Page No: 37

Question: 2

Show the following times in the clock:

Question: 2

Do you like sky watching? If yes, then this one should interest you:

(a) At what time does the sun rise at your place?

(b) When does the sun set?

(c) Does the sun rise and set at the same times every day?

(a) The Sun rises at 6: 00 a.m. at my place.

(b) The Sun sets at 6: 30 p.m. at my place.

(c) No, the Sun does not rise and set at the same times every day.

NCERT book Page No: 38

Find out

Question: 3

How long will it take the minute hand to move from

NCERT book Page No: 39

Question: 4

Draw where the hands will be:

Question: 5

How long does your school assembly take?

Our school assembly takes 30 minutes

Question: 6

How long is your lunch break?

In our school, the lunch break is 1 hour long.

Question: 7

How long is your games period?

The games period in our school is 40 minutes long

Question: 8

Is it the same as all the other periods?

Yes, all the other periods are the same.

Question: 9

The games period and lunch break seem very short! Aren’t they?

No, the time period is enough to play and have lunch.

NCERT book Page No: 40

Question: 10

How many minutes can these activities take? Make a guess and then check at home.

* Boiling of 1 litre milk takes about 6 minutes

* Filling a bucket takes about 3 minutes

* Sweeping the room takes about 6 minutes

Activity Time

Question: 11

In one minute, how many times can you –

(b) Skip a rope ____________

(c) Jump up and down ____________

(d) ___________ _____________

Write more such fun activities in this column

(a) Snap your finger 10 times

(b) Skip a rope 35 times

(c) Jump up and down 45 times

(d) Blinking of eyelids 50 times

Question: 12

Here is another challenge for you. How long can you _________

(a) Speak non stop ______________

(b) Stand on one leg ______________

(c) Sing ‘Aaa…… without a break ______________

(a) Speak non stop 5 minutes

(b) Stand on one leg 3 minutes

(c) Sing ‘Aaaa…. without a break 2 minutes

Question: 13

How long do you take to –

(a) Run a 50 metre race ___________

(b) Collect 50 pebbles from the ground ____________

(c) Count 1 to 100 ____________

(a) Run a 50 metre race 5 minutes

(b) Collect 50 pebbles from the ground 3 minutes

(c) Count 1 to 100 1 minute

NCERT book Page No: 41

Question: 14

Let’s look at a clock again! Solve this one –

(a) The minute hand started from ‘2’. How many minutes will it take to come back to ‘2’ again?

(b) What happens to the hour hand? Does it also move? How long will it take to move from one number to the next?

(c) Look around you and list the activities that take about one hour to complete.

1. _____________

2. ______________

3. _______________

4. _____________

5. ______________

(a) The minute hand takes 60 minutes to come back to 2 again.

(b) Yes, the hour hand also moves. The hour hand takes 1 hour to move from one number to the next number.

(c) Following are the list of activities that takes one hour to complete

1. Cooking food

2. Watching news

4. Completing homework

5. Playing football

Question: 15

How long does it take to cook dinner at home? More than an hour / less than an hour

Cooking dinner takes more than an hour at home.

Question: 16

Question: 17

Which games take less than an hour to finish?

Games take less than an hour to finish are long jump, high jump, snake and ladder etc.

Question: 18

How long does a football match take?

Time duration of a football match is 90 minutes.

NCERT book Page No: 43

Question: 19

Mark these in the correct order on Muniya’s Time Line.

The correct order on Muniya’s Time Line is given below

Question: 20

Muniya got her first tooth in September. How many months old was she then? How many months have passed from March to September?

Muniya was born on 5/03/05 and on 15/09/05 she got her first tooth. So, there are 10 more days for 15/09/05. Therefore, Muniya was 6 months 11 days old when she got her first tooth. From March to September, six months have passed.

Question: 21

How old was Muniya, when

(a) she first sat up?

(b) she got her first tooth?

(a) Muniya was 8 months and 6 days old when she sat up first time.

(b) Muniya was 6 months and 11 days old when she got her first tooth.

Question: 22

What did she do first –

1. Walking / eating a banana?

2. Crawling / standing?

1. She ate banana first

2. She started crawling first

NCERT book Page No: 44

Question: 23

Now make a time-line of this dog’s life in your notebook.

Time line of a dog’s life is given as follows:

Question: 24

Note the differences between Muniya and Rani’s puppy:

The difference between Muniya and Rani’s puppy is as follows:

NCERT book Page No: 45

Question: 25

Do all animals grow at the same speed?

No, the growth of all the animals are not same.

Question: 26

Discuss about the growth of –

1. A hen

2. A cow

3. A bird

The animals given above grow in the following order:

A bird, a hen and a cow

Question: 27

Here are the pictures of grandfathers posing for a photograph. Who looks the oldest to you?

(a) How much older is Appu’s grandfather than Rani’s grandfather?

(b) Will Chuchoo’s grandfather ever grow as old as Appu’s grandfather?

(c) How much younger is Chuchoo rat’s grandfather than Rani’s grandfather?

(a) Elephant’s Appu’s grandfather age = 95 years old

Rani’s grandfather age = 70 years old

Difference between their ages = 95 – 70

= 25 years

Hence, Appu’s grandfather is older than Rani’s grandfather.

(b) No

(c) Chuchoo rat’s grandfather age = 2 years old

Rani’s grandfather age = 70 years old

Difference in their age = 70 – 2

= 68 years old

Therefore, Chuchoo rat’s grandfather is 68 years younger than Rani’s grandfather

NCERT book Page No: 46

Question: 28

Now write which dates these stand for-

5/5/06 5 May 2006

20/5/06 ___________

7/6/06 ___________

1/1/07 ___________

5/5/06 5 May 2006

20/5/06 20 May 2006

7/6/06 7 June 2006

1/1/07 1 Jan 2007

Question: 29

Write these dates in numbers.

1 June 2006 ______________

30 May 2006 ______________

10 August 2007 ______________

1 June 2006 1/6/06

30 May 2006 30/5/06

10 August 2007 10/8/07

Question: 30

How long did it take the letter to reach from Ajmer to Nagpur?

From Ajmer, Atif wrote the letter on 1/5/06. Shobhna got the letter on 6/5/06 in Nagpur. So, the letter took 5 days to reach from Ajmer to Nagpur.

Question: 31

How many days will Atif spend at his Nani’s place?

On 5/5/06, Atif went to his Nani’s place.

On 20/5/06 he returned back from there

Therefore, he spent 15 days at his Nani’s place

Question: 32

Fill in the table:

Question: 33

Who has got longer holidays – Shabana or Atif?

Shabana got 70 days holidays in her school while Atif got 60 days holidays in his school. Hence, Shabana got longer holidays than Atif.

Question: 34

Which long holidays do you get in school? Fill the table.

The given holidays start and end on the dates given below

NCERT book Page No: 48

Question: 35

(a) In which month was the butter packed?

The butter was packed on 15th January 2006.

(b) Which month will it be 180 days after 15/01/06?

Let us calculate 180 days from the date of manufacture.

Days in January = 17 days

In February = 28 days

In March = 31 days

In April = 30 days

In May = 31 days

In June = 30 days

Total days = 17 + 28 + 31 + 30 + 31 + 30 = 167 days

Remaining days = 180 – 167 = 13 days

Hence, the date will be 13th July 2006

(c) Can Chandran eat it on 15th May 2006?

Yes, he can eat it on 15th May 2006

Find Out

Question: 36

Which are the other things that come with an expiry date?

Every products comes with an expiry date. Cold drinks, medicines, biscuits, sweets etc., have an expiry date.

Question: 37

What month and year is written as 07/05? Would it be safe to take the cough syrup in September 2005?

The month and year is written as 07/05 which shows that it is July 2005. No it is not safe to take the cough syrup in September 2005 as the expiry date is till July 2005 only.

NCERT book Page No: 49

Question: 38
Can you guess why they missed the train?

Railway uses 24 hours clock time. The ticket shows the time as 5: 30 means the train was in the morning and they reached at 5: 15 in the evening. If it was in the evening they would have written as 17: 30. Hence, they missed the train.

NCERT book Page No: 50

Question: 39

Look at this chart. It tells the difference between your watch and a 24 hour clock. Try to complete it.

NCERT book Page No: 51

Question: 40

Now can you tell why a 24-hour clock is called so?

We know that there are 24 hours in a day. So, the 24 hours clock shows the time for the entire day. Therefore it is called as 24 hour clock.

Question: 41

Suppose a train leaves at 8: 30 at night. The time written on the Railway ticket would be

The time written on the Railway ticket would be 20: 30

Question: 42

You must have noted the time of sunrise and sunset. Write here using am and pm.

The time of sunrise and sunset on the 1st June

Question: 43

Where have you seen a 24-hour clock being used?

1. _________

2. _________

3. _________

24-hour clock is used in

1. Railway station

2. Airport

3. Bus stand