NCERT Solutions for Class 4 Maths - Tick Tick Tick

Ans:  Muniya was born on 5 March 2005. Muniya started walking on 2 February 2006. Let’s calculate her age from 5 March 2005 to 2 February 2006. Number of days in March 2005 = 31 − 4 = 27 Number of months from April 2005 to January 2006 = 10 Number of days in February 2006 = 2 So, she was 10 months 29 days old when she started walking.
Now, let’s calculate Muniya’s age when she ate food for the first time.
She ate for the first time on 5 September 2005. So, her age will be calculated from 5 March 2005 to 5 September 2006. Time from 5 March 2005 to 4 September 2005 plus 1 day = 6 months 1 day So, she was 6 months 1 day old when she started eating for the first time.
Last, we need to find her age when she got her first tooth. She got her first tooth on 15 September. Her age at that time = 5 March 2005 to 4 September 2005 + 11 days of September = 6 months 11 days Muniya was 6 months 11 days old when she got her first tooth.

Difference between their ages when both started walking = Muniya’s age − Puppy’s age = 10 months 29 days − 1 month = 9 months 29 days
Difference between their ages when both ate food for the first time = Muniya’s age − Puppy’s age = 6 months 1 day − 3 weeks = 5 months 4 weeks 1 day − 3 weeks = 5 months 1 week 1 day
Difference between their ages when both got their first tooth = Muniya’s age − Puppy’s age = 6 months 11 days − 3 weeks = 5 months 4 weeks 11 days − 3 weeks = 5 months 1 week 11 days

Page No 45:

Ques 1: Find out
Here are the pictures of grandfathers posing for a photograph. Who looks the oldest to you?

• How much older is Appu’s grandfather than Rani’s grandfather?_____________________
• Will Chuchoo’s grandfather ever grow as old as Appu’s grandfather?__________________
• How much younger is Chuchoo rat’s grandfather than Rani’s grandfather? _______________
Ans: 

• Elephant Appu’s grandfather is 95 years old and Rani’s grandfather is 70 years old. Difference in their age = 95 − 70 = 25 years So, Appu’s grandfather is 25 years older than Rani’s grandfather.
• No, Chuchoo’s grandfather will never grow as old as Appu’s grandfather.
• Chuchoo’s grandfather is 2 years old and Rani’s grandfather is 70 years old.
  Difference in their age = 70 − 2 = 68 years

So, Chuchoo’s grandfather is 68 years younger than Rani’s grandfather

Page No 47:

Ques 1: Now write which dates these stand for —
5/5/06     5 May 2006              
20/5/06    _____________________
7/6/06      _____________________
1/1/07       _____________________
Ans: 5/5/06    5 May 2006
20/5/06          20 May 2006
7/6/06             7 June 2006
1/1/07             1 January 2007

Ques 2: Write these dates in numbers.
1 June 2006    ______________________
30 May 2006    ______________________
10 Aug 2007    ______________________
Ans:
1 June 2006     1/6/2006
30 May 2006     30/5/2006
10 Aug 2007     10/8/2007

 
Ques 3: How long did it take the letter to reach from Ajmer to Nagpur? ________________
Ans: Atif wrote the letter on 1/5/06, that is, 1 May 2006. Shabana received the letter on 6/5/06, that is, 6 May 2006. Time taken by the letter to reach Nagpur = 6 − 1 = 5 days So, the letter took five days to reach Nagpur.

Ques 4: How many days will Atif spend at his Nani’s place? ______________
Ans: Atif will reach his Nani’s place on 5/5/06, that is, 5 May 2006, and will be back on 20/5/06, that is, 20 May 2006. So, Total number of days Atif will spend at his Nani’s place = 20 − 5 = 15

Ques 5: Fill in the table:

Who has got longer holidays — Shabana or Atif?
Ans: Shabana’s holidays are from 1 June 2006 to 9 August 2006. So, Days in June = 1 June 2006 to 30 June 2006 = 30 Days in July = 1 July 2006 to 31 July 2006 = 31 Days is August = 1 Aug 2006 to 9 Aug 2006 = 9 Shabana’s holidays = 30 + 31 + 9 = 70 days Now, Atif’s holidays are from 1/5/06 to 29/6/06. So, 1/5/06 is 1 May 2006 and 29/6/06 is 29 June 2006. Now, Days in May = 1 May 2006 to 31 May 2006 = 31 Days in June = 1 June 2006 to 29 June 2006 = 29 Atif’s holidays = 31 + 29 = 60 days

So, Shabana has got longer holidays than Atif.

Page No 48:

Ques 1: 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. — In which month was the butter packed? ______ — Which month will it be 180 days after 15/01/06? _____ — Can Chandran eat it one 15th May 2006? _____
Ans: 
— Butter was packed on 15/01/06, so the month of packing is January. — It was best to use the butter before 180 days from the date of packing. Let’s calculate 180 days from the date of packing. 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 calculated so far = 17 + 28 + 31 + 30 + 31 + 30 = 167 Remaining days = 180 − 167 = 13 There will be 13 days in July. So, the date is 13 July 2006. — As it is safe to use the butter till 13 July 2006, Chandran can eat it on 15 May 2006.

Ques 2: Find Out
Which are the other things that come with an expiry date?
Ans: Almost every product comes with an expiry date. Things such as cold drinks, medicines, chips, chocolates, biscuits and sweets have an expiry date.

Ques 3: Find Out
What month and year is written as 07/05? _____________ Would it be safe to take the cough syrup in September 2005? ____________
Ans: The month and the year written as 07/05 are July and 2005, respectively.
No, it would not be safe to take the cough syrup in September 2005.

Page No 50:

Page No 51:

Ques 1: Suppose a train leaves at 8:30 at night. The time written on the Railway ticket would be _____________.
Ans: The train leaves at 8:30 at night, so the time would be 8:30 p.m. Time written on the railway ticket = 12:00 + 08:30 = 20:30 So, the time written on the railway ticket would be 20:30.

Ques 2: You must have noted the time of sunrise and sunset. Write here using am and pm.

Ques 3: Where have you seen a 24-hour clock being used? 
1. ________________ 
2. ________________ 
3. ________________
Ans: 
1. Airport
2. Railway station
3. Military