### Ques 1.

5 , 15 , 30 , 135, 405, 1215, 3645

(a) 3645

(b) 5

(d) 1215

(e) 30

### Ques 2.

2, 3, 6, 10, 18, 27, 54

(a) 10

(b) 27

(c) 3

(d) 6

(e) 18

### Ques 3.

3 , 4 , 8 , 17 , 33 , 49 , 94

(a) 17

(b) 8

(c) 4

(d) 33

(e) 49

### Ques 4.

36 , 49 , 100 , 144 , 196 , 256 , 324

(a) 256

(b) 36

(c) 49

(d) 144

(e) 100

### Ques 5.

508 , 250 , 124 , 60 , 28 , 12 , 4

(a) 28

(b) 124

(c) 60

(d) 12

(e)250

### Ques 6.

2 , 3 , 5 , 8 , 15 , 21 , 34 , 55

(a)5

(b) 8

(c)3

(d)21

(d)15

### Ques 7.

2 , 5 , 10 , 18 , 26 , 37 , 50

(a) 37

(b) 18

(c) 5

(d) 50

(e)2

### Ques 8.

1 , 4 , 7 , 11 , 16 , 22 , 29

(a) 4

(b) 11

(c)22

(d)29

(e)1

### Ques 9.

4 , 6 , 9, 18 , 34 , 59 , 95

(a) 34

(b) 6

(c) 18

(d) 95

(e)9

### Ques 10.

54 , 43 , 34 , 26 , 22 , 19 , 18

(a) 26

(b) 18

(c) 43

(d) 22

(e) 34

### solutions :

**Ans 1.**Each term of the series is obtained by multiplying the previous term by 3 .

⟹ Therefore the particular order is 5, ( 5 x 3 = 15) , ( 15 x 3 = 45) , ( 45 x 3 = 135 ) , ( 135 x 3 = 405 ) , ( 405 x 3 = 1215 )., ( 1215 x 3 = 3645) , .. and so on .

⟹ Hence , alternative (e) consists of the wrong term.

**Ans 2**. In the given sequence second term is 1.5 the first , the third term is 2 times the second and so on, Therefore , alternative (a) consists of the wrong term.

**Ans 3.**In the given sequence difference between successive terms is in the order 12 , 22 , 32 .... . Therefore 58 should replace 49 to from the series .

⟹ Hence alternative (e) consists of the wrong term.

**Ans 4.**Terms of the series would be 62 , 82 , 102, 122, ...... 182 if 49 is replaced 64 .

⟹ Therefore , alternative (c) consists of the wrong term.

**Ans 5.**If 250 is replaced by 252, then difference successive terms of the series will be in the order of 256 , 128, 64, 32 , 16 , 8 respectively which from a particular order .

⟹ Therefore , alternative (e) consists of the wrong term.

**Ans 6.**If 15 is replaced by 13 then a particular order of terms in the series will be formed in which sum of two successive terms is equal to the next term.

⟹ Therefore , alternative (e) consists of the wrong term.

**Ans 7.**If 18 is replaced by 17 then terms of the series will be arranged in the order of 12+ 1 , 22+ 1, 32 + 1 ....72+ 1 .

⟹ Therefore , alternative(b) consists of the wrong term.

**Ans 8.**If first term of the series is replaced by 2 then difference between successive terms of the series will be in the order of 2 , 3 ,4 ,5 ,6 ,7.

⟹ Therefore , alternative (e) consists of the wrong term.

**Ans 9.**If 6 is replaced by 5 then difference between successive terms will be in the order of 1, 4, 9, 16 ,25, 36 .

⟹ Therefore , alternative (b) contain the wrong term.

**Ans 10.**If 26 is replaced by 27 , then difference between successive terms of the series will be on the order of 11, 9, 7, 5, 3 ,1 .

⟹ Therefore , alternative (a) consists the wrong term of the series.

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