Page 216 - Maths Class 05

5. 6.
Actual Sum Estimated Sum Actual Sum Estimated Sum
a. 206 200 a. 28783 28800

b. 152 200 b. 26675 26700
c. 501 500 c. 18600 18600
d. 5392 5400

7. a. 4000 b. 2000 c. 4000 d. 2700 8. a. 50000 b. 80000 c. 90000 d. 200000
9. a. 810000 b. 150000 c. 100000 d. 180000 10. 180 pencils (Estimated)
11. 1300 (Estimated) 12. ` ` 1000000 approximately 13. a. Actual Q = 93, R =1; Estimated Q = 90, R = 0
b. Actual Q = 20, R = 19; Estimated Q = 20, R = 0 c. Actual Q = 474, R = 8; Estimated Q = 500, R = 0
d. Actual Q = 23, R = 4; Estimated Q = 20, R = 0 14. 16 medicines
Sum Up
1. a. i b. iii c. iii d. i e. i 2. a. 64122750 b. 5968471 c. 15734970 d. 9078921
e. 6590993 3. a. 285106 b. 345179 c. 4319458 d. 4678887 e. 68889738 f. 4249579
4. a. Q = 229, R = 2611 b. Q = 6497, R = 16 c. Q = 41184, R = 3 d. Q = 24141, R = 80
e. Q = 24144, R = 23 f. Q = 17914, R = 26 g. Q = 77652, R = 417 h. Q = 85900, R = 503
i. Q = 9215, R = 38 5. a. 12155597 b. 578379 c. 457792 d. 415392 e. 240489 f. 180710
g. 40580091 h. 3523050 i. 29931930 j. 26575285 k. 9933700 l. 16085407
Chapter-3 Multiples and Factors
Practice 3.1
1. a. 4, 8, 12, 16, 20 b. 3, 6, 9, 12,15 c. 7, 14, 21, 28, 35 d. 9, 18, 27, 36, 45 e. 8, 16, 24, 32, 40
f. 12, 24, 36, 48, 60 g. 15, 30, 45, 60, 75 2. 24, 30, 36, 42, 48
Practice 3.2
1. Common multiples of 2, 5 and 10 are 10, 20, 30, ..... 2. Common multiples of 5, 6 and 15 are 30, 60, 90, .....
3. Common multiples of 4, 6 and 8 are 24, 48, 72, ..... 4. Common multiples of 40 and 20 are 40, 80, 120, .....
Practice 3.3
1. Factors of 18 are 1, 2, 3, 6, 9, 18. 2. Factors of 20 are 1, 2, 4, 5, 10, 20. 3. Factors of 10 are 1, 2, 5, 10
4. a. Common factors of 12 and 16 are 1, 2, and 4. b. Common factors of 32 and 40 are 1, 2, 4 and 8.
c. Common factors of 65, 75 and 81 is only 1. d. Common factors of 90, 105 and 125 are 1 and 5.
Practice 3.4
1. a. 225 b. 15 c. 24 d. 3 e. 3 f. 85 2. a. 4 b. 2 c. 15 d. 4 e. 12 f. 24
3. a. 69 b. 15 c. 29 d. 14 e. 96 f. 136 g. 26 h. 60 i. 56 4. a. 2640 b. 15900 c. 288
d. 1260 e. 6300 f. 432 5. a. 288 b. 180 c. 115710 d. 24360 e. 600 f. 2880
6. a. 1, 2, 4, 5, 10, 20 b. 1, 3, 5, 9, 15, 45 c. 1, 2, 3, 6, 9, 18 d. 1, 3, 9, 9, 27, 81 e. 1, 3, 9, 27
f. 1, 2, 5, 10, 25, 50 g. 1, 2, 4, 8, 16, 32 h. 1, 3, 5, 15
Sum Up
1. a. i b. iii c. iii 2. a. i. Factors of 9 : 1, 3, 9 ii. Factors of 12 : 1, 2, 3, 4, 6, 12
iii. Common Factors : 1, 3 iv. HCF : 3
b. i. Factors of 24 : 1, 2, 3, 4, 6, 8, 12, 24 ii. Factors of 40 : 1, 2, 4, 5, 8, 10, 20, 40
iii. Common Factors : 1, 2, 4, 8 iv. HCF : 8
c. i. Factors of 32 : 1, 2, 4, 8, 16, 32 ii. Factors of 40 : 1, 2, 4, 5, 8, 10, 20, 40
iii. Factors of 52 : 1, 2, 4, 13, 26, 52 iv. Common Factors : 1, 2, 4
v. HCF : 4
3. a. 240 b. 150 c. 180 d. 1320 e. 1500 f. 4500 g. 512 h. 11475 i. 864 4. a. 1, 2, 4, 8
b. 1, 3, c. 1, 3 d. 1, 2 e. 1 f. 1, 2
5. a. b. c. d. e. f.
21 140 72 90 26 45

3 7 2 70 2 36 2 45 2 13 3 15
2 35 2 18 3 15 3 5

5 7 2 9 3 5

3 3

Mathematics-5 216