Quiz Discussion

If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to

Course Name: Quantitative Aptitude

  • 1] 4
  • 2] 6
  • 3] 8
  • 4] 10
Solution
No Solution Present Yet

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# Quiz
1
Discuss

Find the 15th term of the sequence 20, 15, 10 . . . . .

  • 1] -45
  • 2] -55
  • 3] -50
  • 4] 0
Solution
2
Discuss

What is the sum of the first 11 terms of an arithmetic progression if the 3rd term is -1 and the 8th term is 19?

  • 1] 204
  • 2] 121
  • 3] 225
  • 4] 104
Solution
3
Discuss

If the sums of n terms of two arithmetic progressions are in the ratio \(\frac{{3n + 5}}{{5n + 7}}\)   then their nth terms are in the ration

 

  • 1]

    \(\frac{{3n - 1}}{{5n - 1}}\)

  • 2]

    \(\frac{{3n + 1}}{{5n + 1}}\)

  • 3]

    \(\frac{{5n + 1}}{{3n + 1}}\)

  • 4]

    \(\frac{{5n - 1}}{{3n - 1}}\)

Solution
4
Discuss

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

  • 1] 56
  • 2] 65
  • 3] 59
  • 4] 62
Solution
5
Discuss

Which term of the A.P. 24, 21, 18, ............ is the first negative term?

  • 1] 8th
  • 2] 9th
  • 3] 10th
  • 4] 12th
Solution
6
Discuss

The 3rd and 6th term of an arithmetic progression are 13 and -5 respectively. What is the 11th term?

  • 1] -29
  • 2] -41
  • 3] -47
  • 4] -35
Solution
7
Discuss

The 4th and 7th term of an arithmetic progression are 11 and -4 respectively. What is the 15th term?

  • 1] -49
  • 2] -44
  • 3] -39
  • 4] -34
Solution
8
Discuss

Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.

  • 1] 5
  • 2] 6
  • 3] 4
  • 4] 3
  • 5] 7
Solution
9
Discuss

For an A.P. if a25 - a20 = 45, then d equals to:

  • 1] 9
  • 2] -9
  • 3] 18
  • 4] 23
Solution
10
Discuss

If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are

  • 1]

    100

  • 2]

    150

  • 3]

    200

  • 4]

    250

Solution
# Quiz