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
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# Quiz
1
Discuss

Consider an infinite G.P. with first term a and common ratio r, its sum is 4 and the second term is 3/4, then

  • 1]

    a = 7/4, r = 3/7

  • 2]

    a = 2, r = 3/8

  • 3]

    a = 3, r = 1/4

  • 4]

    a = 3/2, r = ½

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 first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the sequence are:

  • 1]

    9

  • 2]

    10

  • 3]

    11

  • 4]

    12

Solution
4
Discuss

The sum of the first and third term of an arithmetic progression is 12 and the product of first and second term is 24, then first term is

  • 1]

    4

  • 2]

    1

  • 3]

    8

  • 4]

    6

Solution
5
Discuss

If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?

  • 1] 53
  • 2] 49
  • 3] 57
  • 4] 61
Solution
6
Discuss

The sum of first five multiples of 3 is:

 

  • 1]

    90

  • 2]

    72

  • 3]

    55

  • 4]

    45

Solution
7
Discuss

If S1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S2 is the sum of the terms of the series in odd places, then \(\frac{{{S_1}}}{{{S_2}}}\)

 

  • 1]

    \(\frac{{2n}}{{n + 1}}\)

  • 2]

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

  • 3]

    \(\frac{{n + 1}}{{2n}}\)

  • 4]

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

Solution
8
Discuss

If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =

  • 1]

    3

  • 2]

    4

  • 3]

    1

  • 4]

    2

Solution
9
Discuss

If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be

  • 1] 0
  • 2] p - q
  • 3] p + q
  • 4] -(p + q)
Solution
10
Discuss

What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?

  • 1] 10,050
  • 2] 5050
  • 3] 5000
  • 4] 50,000
Solution
# Quiz