Primary School (English Medium) कक्षा ४ - CBSE Question Bank Solutions

How much will you have to pay for stamps on a letter weighing 50 grams?

Akash wants to send a parcel of the Math Magic textbook to his friend Rani in Chennai. The book weighs 200 g. See the chart to find the cost of posting the book.

Read the weight shown in the picture. Find out the cost of sending a parcel of that weight.

Parcel weight = ______

Cost of stamps =  ______

Rahul needs stamps of Rupees 25 for his parcel. He went to the post office. Only stamps of Rs 1, Rs 2, Rs 5 and Rs 10 were there at that time. Using those stamps in how many different ways can he make Rs 25? 

Can you show five different ways? What is the heaviest parcel he can send using stamps of Rs 25?

A frog was struggling to escape from the mouth of a crow. How can I escape? The frog thought. Suddenly a trick came to his mind. He asked the crow-Are you good at arithmetic? If yes, then I will ask you a problem.

Your weight is 650 g and I am only 145 g. How much do we weigh together? The crow was good at mathematics, so he happily opened his beak to answer.

What happened after that? So what was the answer the crow wanted to give?

The chart shows the height and weight of children between 6 and 10 years old.

Now, you also fill the table by finding out the age, height and weight of any five friends. 

All oranges have equal weight. The two papayas have the same weight. The weights in the first and second balances are equal.

How many oranges balance the weight in the third?

There are 3 marbles of the same size but one marble is slightly heavier or lighter than the other two. Can you find which is that marble and if it is heavier or lighter? You can use a balance only two times.

Rahmat needs to find the length of the boundary of the field.

Can you find it from this picture? See the length of each side written near it.

Ganpat thanked Rahmat and started fencing his own field. But he needed to get more wire.

How long is the boundary of Ganpat’s field?

How much more wire will Ganpat need for his field?

Here are pictures of some more fields. Find out which one has the longest boundary?

1. 
   
   
   Boundary = ______ metre
2. 
   
   Boundary = ______ metre
3. 
   
   Boundary = ______ metre
4. 
   
   Boundary = ______ metre

Chandu’s father is called the ‘young  old man’ in his village. At 70 years of age, he is fully fit. Do you know his secret? He goes for a walk around the field every morning. Everyday he takes four rounds of Chandu’s field.

What is the total distance he covers?

4 × ______ = ______ m = ______ km

Ganpat’s wife works in a tailor’s shop. She has to fix lace around a table cloth.

She bought a 100 metre roll of lace.

Look at the picture of the table cloth and tell how much lace is used for one table cloth.

How much lace will be used in 3 such table cloths?

How much lace will be left in the roll?

Find out the length of the boundary of these shapes. (Hint: You can use a thread)

Now count the squares to find out : 

1. How many squares are there in each shape?
2. Which shape covers the least number of squares?
3. Which shape covers the most number of squares?

Take a 20 centimetre long thread. Make different shapes by joining the ends. Place on the squared sheet on the next page. 

find Out :

1. How many squares are there in each shape?
2. Which is the biggest shape?
3. Which is the smallest shape?
4. How long is the boundary of each shape?

1. How many different shapes can you make by joining two squares? Draw them on the squared sheet given below. How long is the boundary of each shape?
2. Try this activity with three squares also.