SEQUENCE & SERIES

MATH

                                        SEQUENCE & SERIES

TEST - 1

Q #1. The rule of formation of 2, 5, 10…………….. is

a) 2n + 1                 

b) 2n – 1              

c) n² + 1               

d) n² – 1 .

Q # 2 : the 15^th term of the sequence 1/5,1/7,1/9,1/11……….is

a) 1/33                   

b) 1/21                   

c) 1/36                     

d) 1/30

Q # 3: if the 7^th term of an A.P is 14 and 12^th term is 24 find the first term and the common difference.

a) 2, 2                  

b) 3, 2                   

c) 4, 3                      

d) 6, 5.

Q # 4: How many terms of the series 10+ 8 + 6 + 4 +………….. will make the sum 24.

a) 4                    

b) 10                    

c) 25                           

d) 8.

Q # 5: if a, b, c, d, e, f are in A.P then e – c = ?

a) 2( c – a )        

b) 2 ( d – c )         

c) 2 ( f – d )              

d) d – c .

Q # 6: Find 15^th term of the A.P 11/2 6, 13/2, 7………………..is

a) 12                 

b) 13                     

c) 25/2                    

d) None.

Q # 7: a, b, c are  p^th, q^th and r^th terms of an A.P, respectively, then

 p( b – c ) + q( c – a ) + r( a – b) = ?

a) 0                  

b) 2                        

c) 1                           

e) None.

Q # 8: Three consecutive terms of an A.P are x + 2, 2x + 3, 5x – 6. the x = ?

a) 1                 

b) – 1                    

c) 0                            

d) 5.

Q # 9: The sum of the first n terms of two A.Ps are in the ratio 3n + 31 : 5n – 3, which terms of the sequence are equal ?

a) 7^th               

b) 6^th                   

c) 9^th                          

d) None.

Q # 10: how many terms of the series 21 + 18 + 15 …………….. must be taken to amount to 75.

a) 10                 

b) 7                     

c) 5                            

d) both a & c.

   

                    SEQUENCE & SERIES TEST# 1

QUESTION#	ANSWERS
1	C
2	A
3	A
4	D
5	B
6	D
7	A
8	D
9	C
10	D