NCERT solutions for Math - Magic [English] Class 5 chapter 12 - Smart Charts [Latest edition]

Yamini did a project ‘Animals and Birds’. She asked each child in her class about one favorite pet animal.
She used tally marks to record each answer. For example, if someone said ‘cat’ she means 5 cats. In all 24 children said ‘cat’ was their favorite animal. Help Yamini complete the table.

Animal	Tally marks	Number
Cats		24
Dogs
Rabbits
Cows
Parrots
Goats
Squirrel

• Look at the tally marks and write the number for each animal on the table. How many children in all did Yamini talk to?
• Which is the most favorite pet animal on this table?
• Which pet will you like to have? What will you name it? Which other animals can be kept at home? Discuss.

Sumita stood on the road for half an hour and counted the number of vehicles passing by. She made a tally mark for each vehicle. This helped her in counting the total number of vehicles in each group.

• Write the number of each vehicle in the table.
• How many vehicles in all did Sumita see on the road in half an hour?
• Auto rickshaws are thrice the number of trucks — true/false?
• Make tally marks for 7 more buses and 2 more trucks.

In the EVS period, the teacher asked children whether they help their parents at home. There were different answers. Children named the work in which they help their parents the most. The teacher collected their answers and made a table.

Now you can fill the chapati chart to show the numbers given in the table.

Look and find out

Children who help in making or serving food are

Practice time: Afterschool

Ask 10 of your friends about what they like to do most after school.

Ragini loves to watch cartoons on television. One day she thought of counting the number of ads during the breaks. She found that in each break there were 14 advertisements. In 10 of those ads, there were children as actors.

• Why do you think that children are used in so many ads?
• Use tally marks to count the number of ads during a short break in a programme. Were there ads during the news programme?

Try yourself

• Next time when you watch your favourite TV programme, count the number of advertisements during each break. Use tally marks. Put a dot below the tally when you find children in any advertisement.
• Compare with your friends. Do you get different answers?

Have you seen the weather report on TV or in a newspaper? These are two bar charts. These show the highest temperature (in degrees Celsius) in four cities, on two different days. The cities are Delhi, Shimla, Bangalore, and Jaisalmer.

Find out from the bar chart —

• Which city is the hottest on 1 June?

Have you seen the weather report on TV or in a newspaper? These are two bar charts. These show the highest temperature (in degrees Celsius) in four cities, on two different days. The cities are Delhi, Shimla, Bangalore, and Jaisalmer.

• Which city is coldest on 1 December?

Have you seen the weather report on TV or in a newspaper? These are two bar charts. These show the highest temperature (in degrees Celsius) in four cities, on two different days. The cities are Delhi, Shimla, Bangalore, and Jaisalmer.

• Which city shows little change in temperature on the two days: 1 June and 1 December?

Try yourself

On any one day, choose any three cities and record their temperature from the TV or newspaper.

• Make a bar chart in your notebook and ask your friends a few questions about it. See if they understand your chart!

Earlier there were no rabbits in Australia. Rabbits were brought to Australia around the year 1780. At that time there were no animals in Australia which ate rabbits. So the rabbits began to multiply at a very fast rate. Imagine what they did to the crops!

The table shows how rabbits grew every year.

• After each year the number of rabbits was -

Earlier there were no rabbits in Australia. Rabbits were brought to Australia around the year 1780. At that time there were no animals in Australia which ate rabbits. So the rabbits began to multiply at a very fast rate. Imagine what they did to the crops!

The table shows how rabbits grew every year.

• At the end of year 6, the number of rabbits was close to __________.

Earlier there were no rabbits in Australia. Rabbits were brought to Australia around the year 1780. At that time there were no animals in Australia which ate rabbits. So the rabbits began to multiply at a very fast rate. Imagine what they did to the crops!

The table shows how rabbits grew every year.

• After which year did the number of rabbits cross 1000?

Madhav went to a wedding along with his parents. He met many relatives there. But he didn’t know everyone. He met his mother s grandfather but found that her grandmother is not alive. He also found that her mother (grandmother s mother) is still alive, and is more than a hundred years old.
Madhav got confused. He couldn’t imagine his mother’s grandmother’s mother! So, Madhav’s mother made a family tree for him —

Madhav’s mother helped him understand her family with the help of this drawing. You can also find out about your older generations using such a family tree

Answer these question:

• How many grandparents in all does Shobna have?

Madhav went to a wedding along with his parents. He met many relatives there. But he didn’t know everyone. He met his mother s grandfather but found that her grandmother is not alive. He also found that her mother (grandmother s mother) is still alive, and is more than a hundred years old.
Madhav got confused. He couldn’t imagine his mother’s grandmother’s mother! So, Madhav’s mother made a family tree for him —

Madhav’s mother helped him understand her family with the help of this drawing. You can also find out about your older generations using such a family tree

Answer these question:

• How many great, great grand parents in all does Madhav have?

Madhav went to a wedding along with his parents. He met many relatives there. But he didn’t know everyone. He met his mother s grandfather but found that her grandmother is not alive. He also found that her mother (grandmother s mother) is still alive, and is more than a hundred years old.
Madhav got confused. He couldn’t imagine his mother’s grandmother’s mother! So, Madhav’s mother made a family tree for him —

Madhav’s mother helped him understand her family with the help of this drawing. You can also find out about your older generations using such a family tree

Answer these question:

• How many elders will be in the VII generation of his family?

Madhav went to a wedding along with his parents. He met many relatives there. But he didn’t know everyone. He met his mother s grandfather but found that her grandmother is not alive. He also found that her mother (grandmother s mother) is still alive, and is more than a hundred years old.
Madhav got confused. He couldn’t imagine his mother’s grandmother’s mother! So, Madhav’s mother made a family tree for him —

Madhav’s mother helped him understand her family with the help of this drawing. You can also find out about your older generations using such a family tree

Answer these question:

• If he takes his family tree forward in which generation will he find 128 elders?

Find out from the growth chart

• Between which days did the length of the plant change the most?

Find out from the growth chart

• What could be the length of this plant on the 14^th day? Guess.

Find out from the growth chart

• Will the plant keep growing all the time? What will be its length on the 100^th day? Make a guess!