Approximation Question for SBI Clerk and Canara Bank PO 2018 Set2
Directions (Q.15): What value will come in place of question mark (?) in the following questions: (You are not expected to calculate the exact value)
Q.1 201 ÷ 12.98 × 104 ÷ 40.25 ÷ (25.4 ÷ 101) = ?^{2} ÷ √99.9
(A) 70
(B) 60
(C) 50
(D) 40
(E) 30
Q.2 753676 × 334 × 3 = ? × 700000
(A) 1200
(B) 1080
(C) 2000
(D) 1020
(E) None of these
Q.3 √2120 × √1525 ÷ 78 = ?^{1/2}
(A) 550
(B) 500
(C) 530
(D) 470
(E) 450
Q.4 6 

of 269.95 = ?% of 2199.97 
(A) 90
(B) 130
(C) 50
(D) 70
(E) None of these
Q.5 6999.97 + 70.03 × 40% of 23 = ? × 49
(A) 145
(B) 160
(C) 156
(D) 150
(E) 134
Answer 1. (D) 40
Explanation:
201 ÷ 12.98 × 104 ÷ 40.25 ÷ (25.4 ÷ 101) = ?^{2} ÷ √99.9
200 ÷ 13 × 104 ÷ 40 ÷ (25 ÷ 100) = ?^{2} ÷ 10
200 × 8 ÷ 40 × 100 ÷ 25 = ?^{2} ÷ 10
200 ÷ 5 × 4 = ?^{2} ÷ 10
40 × 4 × 10 = ?^{2}
1600 = ?^{2}
? = 40
Answer 2. (B) 1080
Explanation:
753676 × 334 × 3 = ? × 700000
753676 × 1002 = ? × 700000
753676 × 1000 ÷ 700000= ?
? = 107668 ÷ 100
? = 1076.68 ≈ 1080
Answer 3. (C) 530
Explanation:
√2120 × √1525 ÷ 78 = ?^{1/2}
≈ √2116 × √1521 ÷ 78 = ?^{1/2}
46 × 39 ÷ 78 = ?^{1/2}
46 × 3 ÷ 6 = ?^{1/2}
46 ÷ 2 = ?^{1/2}
?^{1/2} = 23
? = 529 ≈ 530
Answer 4. (A) 90
Explanation:
6 

of 269.95 = ?% of 2199.97 

of 270 = ?% of 2200 
7 × 270 = ? × 22
? = 7 × 270 ÷ 22
? = 1890 ÷ 22
? = 85.9 ≈ 90
Answer 5. (C) 156
Explanation:
6999.97 + 70.03 × 40% of 23 = ? × 49
7000 + 70 × 40% × 23 = ? × 49
7000 + 28 × 23 = ? × 49
7000 + 644 = ? × 49
7644 ÷ 49 = ?
? = 156