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Answer:
Q2. a. Factors of 12 are 1, 2, 3, 4, 6 and 12.
b. Factors of 25 are 1, 5, and 25.
c. Factors of 16 are 1, 2, 4, 8 and 16.
d. Factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24.
e. Factors of 18 are 1, 2, 3, 6, 9 and 18.
f. Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18 and 36.
g. Factors of 288 are 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 144 and 288.
h. Factors of 250 are 1, 2, 5, 10, 25, 50, 125 and 250.
Q3. If a number a is exactly divisible by b, then b is a factor of a and a÷b will have 0 as the remainder.
Q4. a. Multiples of 10 between 55 and 105 are
10×6=60
10×7=70
10×8=80
10×9=90
10×10=100
b. Multiples of 15 between 55 and 105 are
15×4=60
15×5=75
15×6=90
15×7=105
c. Multiples of 20 between 55 and 105 are
20×3=60
20×4=80
20×5=100
d.Multiples of 25 between 55 and 105 are
25×3=75
25×4=100
e. Multiples of 30 between 55 and 105 are
30×2=60
30×3=90
f. Multiples of 40 between 55 and 105 are
40×2=80
Q5. a. Multiples of 55 between 200 and 300 are
55×4=220
55×5=275
b. Multiples of 63 between 200 and 300 are
63×4=252
c. Multiples of 82 between 200 and 300 are
82×3=246
d. Multiples of 91 between 200 and 300 are
91 ×3=273
e. Multiples of 43 between 200 and 300 are
43x5=215
43x6=258
f. Multiples of 25 between 200 and 300 are
25 x 9=225
25 x 10 = 250
25 x 11=275
Q6. a. 72, c. 896, e. 4236 and f. 7162 are multiples of 2.
Q7. a. 670, d. 84390 and f. 40 are multiples of 10.