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\ 06-Jan-2025 Bharat Arora Proof-3 Reader’s Sign _______________________ Date __________

Practice Time 4C 5. A class size is the difference between upper and lower limits of a class
1. (a) 35 (b) 8 (c) 22 (d) 14 whereas class mark is the average of class limits of that class.
3. (a) Number of teachers in different age groups. 6. 0
(b) 4 (c) 20–25, 45–50 (d) 35–40 (e) 5 Brain Sizzlers
(f) 22.5, 27.5, 32.5 (g) 32 1. 20% 2. 96° 3. VIII-C
4. (a) 12 (b) 50–60 (c) 26 4. Shift 5 girls → VIII-B to VIII-D and shift 10 girls → VIII-E to VIII-C
6. (a)
Chapter Assessment
A. 1. (a) 2. (d) 3. (d) 4. (d) 5. (a)
6. (c) 7. (c) 8. (b)
B. 1. (d) 2. (c) 3. (d) 4. (a)
C. 1. 2 : 1 2. 96° 3. Hormones, enzymes and other proteins.
4. 900 g 5. 2.25 kg
D. 1. False 2. False 3. True 4. False 5. False
E. 1. (a) 20 (b) 60 (c) 4 (d) 20–30 (e) 30–40
2. (a) 32 (b) 130–135 (c) 5 (d) 19
3.

Think and Answer
Rent and food—`24000, Saving—`16000, Loan EMIs—`20,000
Utilities—`8000, Phone and internet—`4000, Clothing—`4000,
Entertainment—`4000
Practice Time 4D
1. Vanila—32%, Chocolate—38%, Butterscotch—30%
2. (a) Cold drinks (b) 300 people 4. (a) 1 (b) 3 (c) 1 (d) 0
3 2 10 5
3. (a) 100 crores (b) 2.5 times (c)
10 Chapter 5: Squares and Square Roots
6.
Let’s Recall
1.

36
2. (a) 9 cm 2 (b) 121 m 2 (c) 64 mm 2 (d) 10000 m 2
Quick Check 3. (a) 11025 (b) 14641
Certain to happen: (a), (c) 4. 66666 = 4444355556
2
Impossible to happen: (d), (e) 666666 = 444443555556
2
May or may not happen: (b), (f) Quick Check
Think and Answer 1. 25, 36, 49 2. 81
3 1 3 1 Practice Time 5A
A: B: C: D:
8 2 4 8 1. (a) No (b) Yes, square of 27 (c) No
Impossible Equally likely Sure (d) Yes, square of 75
2. (a) 38 (b) 39 (c) 45 (d) 56
0% 25% 50% 75% 100% 3. 3 4. 2 5. 900 6. 3600
D A B C Quick Check
(c) 16 and 24
Practice Time 4E Quick Check
1. (a) 1 (b) 1 2. (a) 21 (b) 19 1. 3364 2. 5329
2 3 40 40 Practice Time 5B
3. (a) 1 (b) 1 (c) 9
13 2 13 1. (a) 4 (b) 9 (c) 4 (d) 1
4. (a) 1 (b) 1 (c) 11 2. (a) Ends with 7 (b) Ends with 3 (c) Ends with 8 (d) Ends with 2
2 2 14 3. (a) and (c)
12 9 3 9 4. (a) 1225 (b) 13225 (c) 676 (d) 8464
5. (a) (b) (c) (d)
25 25 5 25 5. (a) 8, 15 and 17 (b) 14, 48 and 50 (c) 18, 80 and 82
2
(e) 9 (f) 11 6. 1020304030201; 101010101 (c) 231
2
2
7. (a) 6 = 36
(b) 11 = 121
25 25 2 2 2 2
3 7 2 23 8. 6 + 7 + (42) = (43)
6. 7. 8. (a) (b) (7 ) + 8 + 56 = (57) 2
2
2
2
10 11 25 25 2 2 2 2
Mental Maths 8 + (9) + 72 = (73)
1. (a) 9 (b) 23 (c) 9 9. (a) 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
(b) 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 + 25 + 27 + 29
2. The number of times an observation occur in an experiment is known as 10. (a) 95 (b) 49 (c) 183 (d) 283
frequency.
3. 20 4. Histogram (e) 359 (f) 511
Mathematics-8 364