Question 1

31% of 1508 + 26% of 2018 =?

Accepted Answer

? = 31% of 1508 + 26% of 2018 = 1508 x 31 + 20.18 x 26 = 467.48 + 524.68 ≈ 992.16 = 1000

Question 2

85% of 225 + 32.91 x 5.01 =?

Accepted Answer

? = 85% of 225 + 32.91 x 5.01 ≈ 85% of 225 + 33 x 5 = (225 x 85)/100 + 165 = 191.25 + 165 = 356.25 = 355

Question 3

(15.96) 2 + 75% of 285 =?

Accepted Answer

? = (15.96)2 + 75 % of 285 ≈ (16)2 + 214 = 256 + 214 = 470

Question 4

0.0005 x 76 x 10 3 +? = 170% of 29.98?

Accepted Answer

0.0005 x 76 x 103 + ? = 170% of 29.98 ⇒ 0.038 x 1000 + ? = (30 x 170)/100 ∴ ? = 51- 38 = 13 ≈ 12

Question 5

39.8% of 400 +?% of 350 = 230

Accepted Answer

39.8% of 400 + ?% of 350 = 230 ⇒ 159.2 + (350 x ?)/100 = 230 &Arr; ? = (230 - 159.2) x 100/360 = 20.23 = 20

Approximation Questions