Approximation Quiz for SBI Clerk Pre, CET, IBPS Clerk Pre, IBPS RRB, 2021

Direction: What approximate value should come in the place of question mark (?) in the following questions?
Important for :
1
(599 / 51) × (401 / 79) ÷ (31 / 199) = ?
» Explain it
B
? = (599 / 51) × (401 / 79) ÷ (31 / 199)

? ≈ (600 / 50) × (400 / 80) × (200 / 30)

? ≈ 400

Hence, option B is correct.

2
441.01 – 232.9 + 1649.99 = ? + 1225.92
» Explain it
E
441.01 – 232.9 + 1649.99 = ? + 1225.92

? = 441.01 – 232.9 + 1649.99 – 1225.92

? ≈ 441 – 233 + 1650 – 1226  ≈ 632

Hence, option E is correct.

3
(21.5% of 1001)1/3 + (43% of 599)1/2 = ?
» Explain it
D
? = (21.5% of 1001)1/3 + (43% of 599)1/2

≈ (21.5% of 1000)1/3 + (43% of 600)1/2

≈ {(21.5 / 100) × 100} 1/3 + {(43/100) × 600}1/2

≈ (215)1/3 + (258)1/2

≈ 6 + 16  ≈ 22

Hence, option D is correct.

4
(524.21 + 126.108) × 21.09 = ?
» Explain it
B
? = (524.21 + 126.108) × 21.09

≈ (524 + 126) × 21

≈ 650 × 21  ≈ 13650

Hence, option B is correct.

5
» Explain it
E

In approximation,

6400 × (13 / 8) ÷ 353 ? = 10444

10400 + 353 ÷ ? = 10444

353 ÷ ? = 10444 – 10400 = 44

? = 353 ÷ 44  ≈ 8

Hence, option E is correct.