SBI PO Prelims Exam 2017 - Day 14 (Approximation/Number Series)

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Directions—(1–5): What approximate value should come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value.)

1. 194 ÷ 0.4 ÷ 0.7 = ?
(1) 681
(2) 654
(3) 693 
(4) 670
(5) 700


2. 1125 ÷ 21 x 1621 ÷ 24 = ?
(1) 3525
(2) 3618
(3) 3641 
(4) 3591
(5) 3636

3. 15.01 x 11.99 + 21.01 – 34 = ?
(1) 167 
(2) 198
(3) 132
(4) 152
(5) 187

4. 3√7910 = ? 
(1) 33
(2) 38
(3) 29
(4) 43
(5) 24

5. 0.99% of 66021 + 0.19% of 53517 = ?
(1) 600
(2) 760
(3) 780
(4) 670
(5) 635

Directions (Q. 6–10): What should come in place of question mark (?) in the following number series ?

6. 2, 4, 9, 20, 37, ?
(1) 56 
(2) 58
(3) 57
(4) 60
(5) None of these

7. 17, 34, 53, 74, 97, 122, ?
(1) 149
(2) 147
(3) 151
(4) 152
(5) None of these

8. 1,  3,  11,  57,  401,  3611, ?
(1) 25279
(2) 39723
(3) 53169
(4) 37923
(5) None of these

9. 2, 9, 28, 65, 126, 217,  ?
(1) 340
(2) 342
(3) 346
(4) 354
(5) None of these

10. 4, 10, 18, 28, 40, 54, ?
(1) 70
(2) 68
(3) 72
(4) 73
(5) None of these

ANSWERS
1. (3)

2. (2)

3. (1)

4. (4)

5. (2)

6. (4)
The difference between terms is alternate prime numbers i.e. 2, 5, 11, 17 and so on.

7. (1)
The differences are 17, 19, 21, 23 and so on.

8. (2)
The pattern is x1+2, x3+2, x5+2 and so on.

9. (5)
The numbers are 1^3+1, 2^3+1, 3^3+1 and so on.

10. (1)
The pattern is +6, +8, +10, +12 and so on.

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