## NCERT Solutions for Class 4 Mathematics Unit-1 Building With Bricks

**NCERT Textbook Page 2****1. Which floor pattern do you like the most?****Ans**. I like pattern 5 because this seems familiar.

**2. Have you seen such patterns anywhere?****Ans.** Yes, this type of pattern is prevalent in mosques.

**NCERT Textbook Page 3****1. Which pattern is made in a circle?****Ans.** J-pattern is made in a circle.

**2. In which pattern can you show mirror halves? Draw a line.****Ans**. We can show mirror halves in pattern H.

**3. Now you draw some new floor patterns.****Ans**. Some new floor patterns made of brick are given here.

**NCERT Textbook Page 4****1. How to draw a brick?****Ans**. Drawing of brick is given below:**2. How many faces in all does a brick have?****Ans.** A brick has six faces.

**3. Is any face of a brick a square?****Ans**. No. A brick has no square face.

**4. Draw the smallest face of the brick.****Ans.** Smallest face of a brick is being drawn here:**5. Which of these are the faces of a brick? Mark a (Right)****Ans.****6. Which of these is a drawing of a brick? Mark a (Right)****Ans.****7. Make a drawing of this box to show 3 of its faces.****Ans**. Drawing of the given box with three faces is given below:**8. Can you make a drawing of a brick which shows 4 of its faces?****Ans.** No. Such drawing cannot be made. ‘

**NCERT Textbook Page 5****1. What do you think? Which wall will be stronger?****Ans.** Wall made by Zainab will be stronger

**NCERT Textbook Page 6****1. How many different ‘jaali’ patterns can you see in these two photos?****Ans.** There are five different ‘jaali’ patterns in the given two photos.

**NCERT Textbook Page 7****1. Now colour some bricks red and make your own ‘jaali’ patterns in the wall drawn below.****Ans.** My new ‘jaali’ pattern is given in adjoining figure.**2. Now draw some jharokha pattern on the wall here. You can shade it black.****Ans**. New jharokha pattern is given here:

**NCERT Textbook Page 9****1. Have you seen arches in a bridge?****Ans**. Yes.

**2. Where else have you seen an arch?****Ans**. I saw arches in old bridges. One of such bridges is situated in Jaunpur on the river Saryu

**3. Isn’t the ‘jaali’ of this window beautiful? It is made of thin bricks. Have you ever seen thin bricks? Look around.****Ans.** The ‘jaali’ of the window given in photograph is very beautiful. I have seen thin bricks. In Red Fort, situated in Delhi, thin bricks are used.

**NCERT Textbook Page 10****1. Which of these bricks have curved edges?****Ans.** Bricks given in the figure (iii) and (iv) from the top left have curved edges.

**2. How many faces do you see of the longest brick?****Ans**. Two faces are seen in the longest brick given in the figure.

**3. Is there any brick which has more than six faces?****Ans**. There are six faces in a brick, but only three of them can be seen at a time. A broken brick may have more than six faces.

**4. Have you seen bricks of different sizes?****Ans.** Yes, I saw bricks of different sizes.

**5. Take one brick and measure it.****(a) How long is it? (b) How wide is it? (c) How high is it?****Ans.** (a) 10 inches (b) 5 inches (c) 3 inches.

**6. Muniya wants to make a wall 1 metre long. How many bricks will she need to put in a line?****Ans.** She requires 4 bricks. The wall will become 25.4 x 4 = 1.016 metre long which is slightly more than one metre.

**7. Can you guess how high is the chimney here? Is! it:****(a) About 5 metres? (b) About 15 metres? (c) About 50 metres?****Ans.** The height of chimney given in the figure is about 50 metres.

**NCERT Textbook Page 11****1. Here are four pictures from the brick kiln. These pictures are jumbled up. Look at them carefully. Write the correct order**.**Ans.** The correct order of the figure is C, D, B, A.

**NCERT Textbook Page 12****1. Can you try to write the number one lakh.****Ans.** 100000.**2. Look at these photos and guess how many bricks are carried by this truck.****Ans**. Usually, a truck carries about 3000 bricks.**3. Bhajan decided to buy the new bricks from Brickabad. He bought three thousand bricks. How much did he pay?****Given the price of bricks****Old bricks — Rs 1200 for one thousand bricks****New bricks from Intapur — Rs 1800 for one thousand bricks****New bricks from Brickabad — Rs 2000 for one thousand bricks****Ans**. Bhajan has to pay Rs 6000.**1. Guess what he will pay if he buys 500 old bricks.****Ans.** He will pay Rs 600.