Approximation Question for SBI Clerk, IDBI Executive and Railway Group D 2018 Set-3

Approximation Question for SBI Clerk, IDBI Executive and Railway Group D 2018 Set-3

Directions (Q.1-5): What value will come in place of question mark (?) in the following questions: (You are not expected to calculate the exact value)

Q.1 (√5185 × 19) ÷ (6.001 × 56.99) = ? ÷ 3

(A) 20

(B) 35

(C) 50

(D) 10

(E) 25

 

Q.2 421.009 + 2.997 × 89.007 = ?

(A) 765

(B) 690

(C) 625

(D) 640

(E) 720

 

Q.3 144.01 × 35.989 ÷ 71.993 – 20.009 × 2 = ?

(A) 30

(B) 50

(C) 75

(D) 90

(E) 45

Q.4 √1025 + (3.99)2 × 3 = ? ÷ 
1
 9.997

(A) 16

(B) 10

(C) 8

(D) 19

(E) 24

 

Q.5 6.99 × 3.001 + 20.003 – 18.996 = ? – 27.003

(A) 30

(B) 120

(C) 90

(D) 70

(E) 50

 

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Answer 1. (D) 10

Explanation:

(√5185 × 19) ÷ (6.001 × 56.99) = ? ÷ 3

(√5184 × 19) ÷ (6 × 57) = ? ÷ 3

(72 × 19) ÷ (6 × 57) = ? ÷ 3

72 ÷ 18 = ? ÷ 3

4 × 3 = ?

? = 12 ≈ 10

 

Answer 2. (B) 690

Explanation:

421.009 + 2.997 × 89.007 = ?

? = 421 + 3 × 89

? = 421 + 267

? = 688 ≈ 690

 

Answer 3. (A) 30

Explanation:

144.01 × 35.989 ÷ 71.993 – 20.009 × 2 = ?

144 × 36 ÷ 72 – 20 × 2 = ?

2 × 36 – 40 = ?

? = 72 – 40

? = 32 ≈ 30

 

Answer 4. (B) 10

Explanation:

Q.4 √1025 + (3.99)2 × 3 = ? ÷ 
1
 9.997
1024 + (4)2 × 3 = ? ÷
1
 10

32 + 48 = ? × 10

80 ÷ 10 = ?

? = 8 ≈ 10

 

Answer 5. (E) 50

Explanation:

6.99 × 3.001 + 20.003 – 18.996 = ? – 27.003

7 × 3 + 20 – 19 = ? – 27

21 + 1 + 27 = ?

? = 49 ≈ 50

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