Wrong Number series for SBI PO

Wrong Number series for SBI PO

Directions (1 – 10): In each of the following number series, a wrong number is given. Find out the wrong number.

1. 13, 16, 38, 124, 504, 2535

(a) 16

(b) 38

(c) 124

(d) 504

(e) 2535

2. 6, 10, 32, 111, 464, 2345

(a) 10

(b) 32

(c) 111

(d) 464

(e) 2345

3. 8, 18, 64, 272, 1395, 8424

(a) 18

(b) 64

(c) 272

(d) 1395

(e) 8424

4. 80, 105, 195, 478, 1350, 3975

(a) 105

(b) 195

(c) 478

(d) 1350

(e) 3975

5. 8, 18, 78, 420, 2424, 15270

(a) 18

(b) 78

(c) 420

(d) 2424

(e) 15270

6. 6    7     16     41     90     154      292

(a) 7

(b) 16

(c) 41

(d) 90

(e) 154

7. 484     240     120     57     26.5     11.25     3.625

(a) 240

(b) 120

(c) 57

(d) 26.5

(e) 11.25

8. 16, 47, 138, 414, 1238, 3709

(a) 47

(b) 1238

(c) 414

(d) 16

(e) 138

9. 120, 141, 180, 194, 236, 251

(a) 120

(b) 180

(c) 236

(d) 251

(e) 194

10. 543, 559, 595, 659, 789, 903

(a) 595

(b) 903

(c) 789

(d) 559

(e) 659

Answers:

1. C) The number should be 123.

×1 + 3, ×2 + 6, ×3 + 9 ...

2. A) The number should be 11.

×1 + 5, ×2 + 10, ×3 + 15 ...

3. B) The number should be 63.

+1 × 2, +3 × 3, +5 × 4, +7 × 5 ...

4. C) The number should be 480.

–45 × 3, –40 × 3, –35 × 3 ...

5. D) The number should be 2420.

+13 × 2, +23 × 3, +33 × 4 ...

6. E) The Series is +1², +3², +5², +7²

7. B) The series is (÷2-2), (÷2-2), (÷2-2)

8. E) The Series is

×3 – 1; ×3 – 2; ×3 – 3; ×3 – 4; ×3 – 5

Hence, there should be 139 in place of 138

9. A) The series is +13, +39, +14, +42, +15

Hence, there should be 128 in place of 120.

10. C) The series is +4², +6², +8², +10², +12²

Hence, there should be 759 in place of 789.