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

The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?

  • 1] 25
  • 2] 29
  • 3] 21
  • 4] 33
Solution
2
Discuss

The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?

  • 1] 34
  • 2] 28
  • 3] 25
  • 4] 31
Solution
3
Discuss

A piece of equipment cost a certain factory 6,00,000. If it depreciates in value, 15% the first year, 13.5% the next year, 12% the third year, and so on, what will be its value at the end of 10 years, all percentages applying to the original cost?

  • 1] Rs. 2,00,000
  • 2] Rs. 1,05,000
  • 3] Rs. 4,05,000
  • 4] Rs. 6,50,000
Solution
4
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
5
Discuss

A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues indefinitely. If a side of the first square is 4 cm, determine the sum of the areas all the square.

  • 1] 32 Cm2
  • 2] 16 Cm2
  • 3] 20 Cm2
  • 4] 64 Cm2
  • 5] None of these
Solution
6
Discuss

A bacteria gives birth to two new bacteria in each second and the life span of each bacteria is 5 seconds. The process of the reproduction is continuous until the death of the bacteria. initially there is one newly born bacteria at time t = 0, the find the total number of live bacteria just after 10 seconds :

  • 1]

    \(\frac{{{3^{10}}}}{2}\)

  • 2]

    310 - 210

  • 3]

    243 × (35 -1)

  • 4]

    310 - 25

  • 5]

    None of these

Solution
7
Discuss

If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 term is

  • 1] 3200
  • 2] 1600
  • 3] 200
  • 4] 2800
Solution
8
Discuss

If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is

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