Fun with Numbers (Numbers 21 to 99) — NCERT Solutions

Given: A matchbox is used to collect small items.

Concept: Counting objects and comparing with the number 50.

Working:

1. Take an empty matchbox.
2. Collect very small items such as seeds, small pebbles, grains of rice, or tiny beads.
3. Fill the matchbox with these items.
4. Take them out and count them carefully, grouping in tens.
5. Write the total number.
6. Check: Is the number more than 50, equal to 50, or less than 50?

Answer: Students do this activity and write the number of items they collected. They compare their number with 50 and discuss with friends.

Given: We need to count and write numbers from 51 to 60.

Concept: Numbers 51 to 60 have 5 tens and ones from 1 to 0.

Working:
$$51, 52, 53, 54, 55, 56, 57, 58, 59, 60$$

In words:

• $51$ — Fifty One
• $52$ — Fifty Two
• $53$ — Fifty Three
• $54$ — Fifty Four
• $55$ — Fifty Five
• $56$ — Fifty Six
• $57$ — Fifty Seven
• $58$ — Fifty Eight
• $59$ — Fifty Nine
• $60$ — Sixty

Answer: 51, 52, 53, 54, 55, 56, 57, 58, 59, 60

Given: Some numbers between 61 and 80 are provided; fill in the rest.

Concept: Numbers 61–80 follow the same pattern — tens increase from 6 to 8, ones go from 1 to 9 then reset.

Working — Complete list:

• $61$ — Sixty One
• $62$ — Sixty Two
• $63$ — Sixty Three
• $64$ — Sixty Four
• $65$ — Sixty Five
• $66$ — Sixty Six
• $67$ — Sixty Seven
• $68$ — Sixty Eight
• $69$ — Sixty Nine
• $70$ — Seventy
• $71$ — Seventy One
• $72$ — Seventy Two
• $73$ — Seventy Three
• $74$ — Seventy Four
• $75$ — Seventy Five
• $76$ — Seventy Six
• $77$ — Seventy Seven
• $78$ — Seventy Eight
• $79$ — Seventy Nine
• $80$ — Eighty

Answer: Write each number and its name as listed above.

Given: We need to write numbers from 81 to 100.

Concept: Numbers 81 to 100 have 8 or 9 or 10 tens.

Working:

• $81$ — Eighty One
• $82$ — Eighty Two
• $83$ — Eighty Three
• $84$ — Eighty Four
• $85$ — Eighty Five
• $86$ — Eighty Six
• $87$ — Eighty Seven
• $88$ — Eighty Eight
• $89$ — Eighty Nine
• $90$ — Ninety
• $91$ — Ninety One
• $92$ — Ninety Two
• $93$ — Ninety Three
• $94$ — Ninety Four
• $95$ — Ninety Five
• $96$ — Ninety Six
• $97$ — Ninety Seven
• $98$ — Ninety Eight
• $99$ — Ninety Nine
• $100$ — One Hundred

Answer: 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100

Given: A 10×10 number grid (1 to 100) with several numbers missing.

Concept: Numbers 1 to 100 are arranged in order. Each row contains 10 consecutive numbers.

Working — Fill in each missing number:

Row 1 (100 to 92): $100, \mathbf{99}, 98, 97, 96, 95, \mathbf{94}, 92, \mathbf{93}$
→ Missing: $99, 94, 93$

Row 2 (81 to 90): $81, 82, 83, 84, \mathbf{85}, 86, 87, 88, \mathbf{89}, 90$
→ Missing: $85, 89$

Row 3 (72 to 80): $80, 79, \mathbf{78}, 77, 76, \mathbf{75}, 74, 73, 72$
→ Missing: $78, 75$

Row 4 (61 to 70): $61, 62, 63, \mathbf{64}, 65, 66, \mathbf{67}, 68, 69, \mathbf{70}$
→ Missing: $64, 67, 70$

Row 5 (52 to 60): $\mathbf{60}, 59, 58, \mathbf{57}, 56, \mathbf{55}, 54, 53, 52$
→ Missing: $60, 57, 55$

Row 6 (41 to 50): $41, 42, 43, \mathbf{44}, 45, \mathbf{46}, \mathbf{47}, 48, \mathbf{49}, 50$
→ Missing: $44, 46, 47, 49$

Row 7 (32 to 40): $40, \mathbf{39}, 38, 37, 36, \mathbf{35}, 34, 33, 32$
→ Missing: $39, 35$

Row 8 (21 to 30): $21, 22, \mathbf{23}, 24, 25, \mathbf{26}, 27, 28, \mathbf{29}, 30$
→ Missing: $23, 26, 29$

Row 9 (12 to 20): $20, 19, 18, 17, 16, 15, \mathbf{14}, 13, 12$
→ Missing: $14$

Row 10 (1 to 10): $1, 2, 3, \mathbf{4}, 5, 6, \mathbf{7}, 8, 9, \mathbf{10}$
→ Missing: $4, 7, 10$

Answer: Fill in the bold numbers above in the corresponding blank squares of the grid.

Given: A Warli painting is shown in the picture.

Answers:

A. The picture shows people doing daily activities like dancing, farming, and living in a village. It is a traditional tribal painting.

B. Different things visible: houses, trees, people, animals, sun/moon, fields. (Students describe what they see.)

C. Count the houses shown in the picture and write the number. (Answer depends on the picture — students count carefully.)

D. Count all the people (figures) shown in the picture and write the number. (Answer depends on the picture.)

E. Each leaf of a tree in Warli art is usually drawn using simple lines. Students guess and count the lines used for one tree's leaves.

F. The special name for this type of painting is Warli Painting (also written as Warli or Warali art). It is a form of tribal art.

G. Maharashtra (the state of Maharashtra, particularly the Palghar district near Mumbai) is famous for Warli painting. It is made by the Warli tribe.

Answer: F — Warli Painting; G — Maharashtra, India.

Given: Students are asked to create their own Warli drawing.

Concept: Warli art uses simple geometric shapes — circles, triangles, and straight lines — to draw people, animals, trees, and houses.

Steps to make a Warli drawing:

1. Take a sheet of paper (preferably brown or black to look like mud walls).
2. Use a white crayon, chalk, or white paint.
3. Draw basic shapes:

• Circle for the head of a person.
• Two triangles joined at the tip for the body.
• Straight lines for arms and legs.

4. Draw a house using a square and a triangle on top.
5. Draw trees using a straight line (trunk) and a circle or triangle (leaves).
6. Add animals, the sun, and other elements using simple shapes.
7. Arrange all elements to tell a story of village life.

Answer: Students draw their own Warli picture using circles, triangles, and lines. There is no single correct answer — creativity is encouraged.