**Directions (1-15):**

*In each of the following questions, one term in the number series is wrong. Find out the wrong term.***1. 24, 27, 31, 33, 36**

(a) 24

(b) 27

(c) 31

(d) 33

**2. 196, 169, 144, 121, 80**

(a) 80

(b) 121

(c) 169

(d) 196

**3. 3, 5, 7, 9, 11, 13**

(a) 3

(b) 5

(c) 7

(d) 9

**4. 121, 143, 165, 186, 209**

(a) 143

(b) 165

(c) 186

(d) 209

**5. 1, 2, 4, 8, 16, 32, 64, 96**

(a) 4

(b) 32

(c) 64

(d) 96

**6. 8, 14, 26, 48, 98, 194, 386**

(a) 14

(b) 48

(c) 98

(d) 194

**7. 8, 13, 21, 32, 47, 63, 83**

(a) 13

(b) 21

(c) 32

(d) 47

**8. 3, 10, 27, 4, 16, 64, 5, 25, 125**

(a) 3

(b) 4

(c) 10

(d) 27

**9. 380, 188, 92, 48, 20, 8, 2**

(a) 188

(b) 92

(c) 48

(d) 20

**10. 1, 3, 7, 15, 27, 63, 127**

(a) 7

(b) 15

(c) 27

(d) 63

**11. 2, 5, 10, 17, 26, 37, 50, 64**

(a) 50

(b) 26

(c) 37

(d) 64

**12. 1, 3, 10, 21, 64, 129, 256, 778**

(a) 10

(b) 21

(c) 129

(d) 256

**13. 15, 16, 22, 29, 45, 70**

(a) 16

(b) 22

(c) 45

(d) 70

**14. 6, 14, 30, 64, 126**

(a) 6

(b) 14

(c) 64

(d) 126

**15. 10, 26, 74, 218, 654, 1946, 5834**

(a) 26

(b) 74

(c) 218

(d) 654

**Answer Of Series Completion Questions**

**1. (c) :**Each term in the series is increased by 3 to obtain the next term. So. 31 is wrong and must be replaced by (27 + 3) i.e. 30.

**2. (a)**

**3. (d) :**The series consists of consecutive prime numbers. So. 9 is wrong.

**4. (c):**Each term of the series is increased by 22 to obtain the next term. So. 186 is wrong and must be replaced by (165 + 22) i.e. 187.

**5. (d) :**Each term of the series is obtained by multiplying the preceding term by 2 So, 96 is wrong and must be replaced by (64 x 2) i.e. 128.

**6. (b) :**Each term in the series is less than twice the preceding term by 2. So. 48 is wrong and should be replaced by (26 x 2 - 2) i.e. 50.

**7. (d) :**Go on adding 5, 8, 11, 14, 17, 20.

So, the number 47 is wrong and must be replaced by 46.

**8. (c)**

**9. (c) :**The correct pattern is - 192, - 96, - 48, - 24, - 12, - 6.

So, 48 is wrong and must be replaced by (92 - 48) i.e. 44.

**10. (c)**

**11. (d):**(1x1)+1 , (2x2)+1 , (3x3)+1 , (4x4)+1 , (5x5)+1 , (6x6)+1 , (7x7)+1 , (8x8)+1

But, 64 is out of pattern.

**12. (d) :**The sequnece is ( x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1,....)

So, 256 is wrong and must be replaced by (129 x 2 + 1) i.e. 259.

**13. (b)**

**14. (c):**Each term is multiplied by 2 and then increased by 2 to obtain the next term. So, 64 is wrong and must be replaced by (30 x 2 + 2) i.e. 62.

**15. (d):**Each term is 4 less than thrice the preceding number.

So, 654 is wrong and must be replaced by (218 x 3 - 4) - 650.

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