Quiz Discussion

The first and last term of an A.P. is a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by \(\frac{{{l^2} - {a^2}}}{{k - \left( {l + a} \right)}}\)   then k = ?

 

Course Name: Quantitative Aptitude

  • 1] S
  • 2] 2S
  • 3] 3S
  • 4] None of these
Solution
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# Quiz
1
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For A.P. T18 - T8 = ........ ?

  • 1] d
  • 2] 10d
  • 3] 26d
  • 4] 2d
Solution
2
Discuss

The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its

  • 1] 24th term
  • 2] 27th term
  • 3] 26th term
  • 4] 25th term
Solution
3
Discuss

The 2nd and 8th term of an arithmetic progression are 17 and -1 respectively. What is the 14th term?

  • 1]

    -19

  • 2]

    -22

  • 3]

    -20

  • 4]

    -25

Solution
4
Discuss

The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is

  • 1] 600
  • 2] 765
  • 3] 640
  • 4] 680
  • 5] 690
Solution
5
Discuss

How many 2-digit positive integers are divisible by 4 or 9?

  • 1]

    32

  • 2]

    22

  • 3]

    34

  • 4]

    30

Solution
6
Discuss

15th term of A.P., x - 7, x - 2, x + 3, ........ is

  • 1] x + 63
  • 2] x + 73
  • 3] x + 83
  • 4] x + 53
Solution
7
Discuss

If the nth term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. is

  • 1] n(n - 2)
  • 2] n(n + 2)
  • 3] n(n + 1)
  • 4] n(n - 1)
Solution
8
Discuss

What is the sum of the first 12 terms of an arithmetic progression if the 3rd term is -13 and the 6th term is -4?

  • 1]

    -30

  • 2]

    41

  • 3]

    -23

  • 4]

    -34

Solution
9
Discuss

If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :

  • 1] 13
  • 2] 9
  • 3] 21
  • 4] 17
Solution
10
Discuss

The common difference of the A.P. \(\frac{1}{{2b}} \frac{{1 - 6b}}{{2b}}  \frac{{1 - 12b}}{{2b}}\)   . . . . . is

 

  • 1] 2b
  • 2] -2b
  • 3] 3
  • 4] -3
Solution
# Quiz