# CoCubes Series Question and Answers Quiz-1

Question 1

Time: 00:00:00
The  5 th  term   and  21 st  term  of  a  series  in  A.P  are  10  and  42  respectively.   Find  the  31 st  term.

50

50

55

55

60

60

62

62

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Question 2

Time: 00:00:00
Find  the  common  ratio  of  three  numbers  in  G.P  whose  product  is  216  and  the  sum   of  the  products  taken  in  pairs  is  114.

2 or 1/2

2 or 1/2

2/3 or 3/2

2/3 or 3/2

3/4 or 4/3

3/4 or 4/3

4 or ¼

4 or ¼

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Question 3

Time: 00:00:00
Four  angles  of  a  quadrilateral  are  in  G.P.  Whose  common  ratio  is  an  intiger.  Two  of  the  angles  are  acute  while  the  other  two  are  obtuse.   The  measure  of  the  smallest   angle  of  the  quadrilateral  is

12

12

24

24

36

36

48

48

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Question 4

Time: 00:00:00
If  sum  of  three  numbers  in  A.P  is  33  and  sum  of their   squares  id  491,  then  what  are  the  three  numbers.

5,11,17

5,11,17

3,11,19

3,11,19

9,11,13

9,11,13

64, 8, 3

64, 8, 3

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Question 5

Time: 00:00:00
In  an  A.P  consisting  of  27  terms,  the  sum  of  the  first  three  terms  is  21  and  that  of the  three  middle  terms  is  93.  Find  the  first  term  and  the  common  difference.

6, 3

6, 3

6, 23

6, 23

7, 3

7, 3

5, 2

5, 2

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Question 6

Time: 00:00:00
There  are  n  arithmetic  means  between  3  and  45  such  that  the  sum  of  these  arithmetic  means  is  552.  find   the  value   of  n.

11

11

15

15

17

17

23

23

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Question 7

Time: 00:00:00
The sum of the first 6 terms of a geometric series is 10,01 times the sum of its 3 terms.  Find  the  common  ratio  of  these  series

√1,000

√1,000

√10

√10

10

10

100

100

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Question 8

Time: 00:00:00
There is n  arithmetic  means  between  3  and  45  such  that  the  sum  of  these  arithmetic  means  is  552.  find   the  value   of  n.

11

11

15

15

17

17

23

23

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Question 9

Time: 00:00:00
Find  the  sum  of   the  following  series,

1,4/5,16/25,64/125  ……………..

10

10

6

6

9

9

5

5

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Question 10

Time: 00:00:00
The  sum  of  n  terms  of  a  series  in  A.P  is  6n2 + 6n.  What  is  the  4 th  term  of  the  series?

38

38

49

49

60

60

48

48

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["0","40","60","80","100"]
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