Approximation Questions and Answers for IBPS Clerk Pre 2018, Download PDF For Free at Smartkeeda

Direction: What approximate value should come in place of question mark.
1
√578 × √1297 +  23  × 456 = ?
100
» Explain it
C
√578 × √1297 +  23  × 456 = ?
100
 
? = 24.01 × 36.01 + 104.88
 
? ≈ 24 × 36 + 105
 
∴ ? ≈  969
 
Hence, option (C) is correct. 
 
2
12.15 × 24.8 × ? = 4556.8 + 56.2
» Explain it
A
12.15 × 24.8 × ? = 4556.8 + 56.2

= 12 × 25 × ? = 4557 + 56

⇒ 300 × ? = 4613

⇒ ? =  4613
300

⇒ ? = 15.37

⇒ ? ≈ 15

Hence, option (A) is correct.
 
3
4  ×  6  ×  23  ×  56  × 789.89 = ?
5 7 4 5
» Explain it
D
4  ×  6  ×  23  ×  56  × 789.89 = ?
5 7 4 5

? =  4  ×  6  ×  23  ×  56  × 789.89
5 7 4 5

? ≈  4  ×  6  ×  23  ×  56  × 790
5 7 4 5

? = 34886.4

? ≈ 34886

Hence, option (D) is correct.
 
4
13456.965  + (36.21 + √1226.5) = ?
9.98
» Explain it
B
13456.965  + (36.21 + √1226.5) = ?
9.98

? ≈  13457  + (36 + 35.02)
10

? ≈ 1345.7 + 71.02

? ≈ 1346 + 71

? ≈ 1417

Hence, option (B) is correct.
 
5
(7.04)2 + (6.98)3 + 567.123 – (4.12)4 = ?
» Explain it
C
(7.04)2 + (6.98)3 + 567.123 – (4.12)4

? ≈ (7)2 + (7)3 + 567 – (4)4

= 49 + 343 + 567 – 256 
 
= 703
 
Hence, option (C) is correct.