Approximation For IBPS RRB Exam, Check Important Question

Approximation for IBPS RRB Exam- Approximation is an important topic in the quantitative aptitude section of the IBPS RRB exam. It questions a candidate’s ability to quickly and accurately approximate values, which is solving for solving problems efficiently under time constraints. Approximation involves estimating a number or value as close to its actual value as possible, often simplifying complex calculations. This skill is especially useful in exams where quick mental calculations can save candidates time and solve simple questions. These questions usually involve arithmetic operations such as addition, subtraction, multiplication and division. In this article, we provide an overview of the approximation topic, and important questions, and offer strategies for mastering the approximation topics.

Important Question Approximation for IBPS RRB 2024 Exam

Question 1: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

(56.04% of 550.06 + 19.92 × 18.13) – 121.97 = ?

A) 546

B) 412

C) 326

D) 638

E) 756

Question 2: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

16.11 × 9.96 – (238.19 – 64.04 × 2.18) = ?

A) 10

B) 50

C) 90

D) 130

E) 180

Question 3: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

(246.12 + 501.97 + 449.24) ÷ 6.86 = ?

A) 23

B) 84

C) 171

D) 256

E) 312

Question 4: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

25.05 × 8.99 + 2.043 – 60.03 × 2.99 = ?

A) 78

B) 90

C) 47

D) 29

E) 34

Question 5: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

?% of 624.98 + 25.04 = 80.02% of 719.98 + 1448.99

A) 320

B) 480

C) 560

D) 120

E) 250

Question 6: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

(16.02)² – 19.98% of 200.04 + √288.94 = ?

A) 197

B) 380

C) 233

D) 117

E) 293

Question 7: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

(660.05) ÷ 120.04% of (55.022/2.24) = (? ÷ 10.02)

A) 240

B) 120

C) 250

D) 200

E) 160

Question 8: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

√{(26.98)² × 40.02% of 39.98} + (168.9)^1/2 = ?²

A) 16

B) 11

C) 8

D) 21

E) 2

Question 9: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

(12.01)² × (1.001)⁵⁶⁷ – 67.98 = ?² – 4.98

A) 9

B) 12

C) 15

D) 18

E) 21

Question 10: What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

(80.98)^1/2 + 90.02% of 450.02 – ? = 399.98

A) 34

B) 24

C) 14

D) 45

E) 2

Solution 1: A)

(56.04% of 550.06 + 19.92 × 18.13) – 121.97 = ?

(56% of 550 + 20 × 18) – 122 ~ ?

(308 + 360) – 122 ~ ?

546 ~ ?

Hence, option a.

Solution 2: B)

16.11 × 9.96 – (238.19 – 64.04 × 2.18) = ?

16 × 10 – (238 – 64 × 2) ~ ?

160 – (238 – 128) ~ ?

160 – 110 ~ ?

50 ~ ?

Hence, option b.

Solution 3: C)

(246.12 + 501.97 + 449.24) ÷ 6.86 = ?

(246 + 502 + 449) ÷ 7 ~ ?

1197 ÷ 7 ~ ?

171 ~ ?

Hence, option c.

Solution 4: C)

25.05 × 8.99 + 2.043 – 60.03 × 2.99 = ?

25 × 9 + 2 – 60 × 3 ~ ?

225 + 2 – 180 ~ ?

? ~ 47

Hence, option c.

Solution 5: A)

?% of 624.98 + 25.04 = 80.02% of 719.98 + 1448.99

?% of 625 + 25 ~ 80% of 720 + 1449

(?/100) × 625 + 25 ~ (80/100) × 720 + 1449

(?/100) × 625 ~ 576 + 1449 – 25

? ~ {(2000 × 100)/625}

? ~ 320

Hence, option a.

Solution 6: C)

(16.02)² – 19.98% of 200.04 + √288.94 = ?

(16)² – 20% of 200 + √289 ~ ?

256 – (20/100) × 200 + 17 ~ ?

256 – 40 + 17 ~ ?

? ~ 233

Hence, option c.

Solution 7: D)

(660.05) ÷ 120.04% of (55.022/2.24) = (? ÷ 10.02)

660 ÷ {(120/100) × (55/2)} ~ (?/10)

(660 ÷ 33) × 10 ~ ?

20 × 10 ~ ?

? ~ 200

Hence, option d.

Solution 8: B)

√{(26.98)² × 40.02% of 39.98} + (168.9)^1/2 = ?²

√{(27)² × 40% of 40} + (169)^1/2 ~ ?²

√{(27)² × 16} + 13 ~ ?²

27 × 4 + 13 ~ ?²

121 ~ ?²

? ~ ±11

Hence, option b.

Solution 9: A)

(12.01)² × (1.001)⁵⁶⁷ – 67.98 = ?² – 4.98

(12)² × (1)⁵⁶⁷ – (68) ~ ?² – 5

144 – 68 + 5 ~ ?²

81 ~ ?²

? ~ ±9

Hence, option a.

Solution 10: C)

(80.98)^1/2 + 90.02% of 450.02 – ? = 399.98

(81)^1/2 + 90% of 450 – ? ~ 400

9 + 405 – 400 ~ ?

? ~ 14

Hence, option c.

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