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Quantitative Aptitude > Square Root And Cube Root :
Question 1.

Find the values of x in the Arithmetic series 3x+1,5x-1,5x+1,......

Options:
  1.    2
  2.    3
  3.    7
  4.    8
  5.    None of these
Answer: Option A

Question 2.

Find the number of terms in the series 2,3.5,5,...62 ?

Options:
  1.    41
  2.    42
  3.    50
  4.    62
  5.    None of these
Answer: Option A
 -  In the series 62 is the 41st term

Question 3.

Find the number of terms in the series 11,6,1,...-54?

Options:
  1.    12
  2.    13
  3.    14
  4.    15
  5.    None of these
Answer: Option C
 -  -54 is the 14th term in the series

Question 4.

In an A.P the 10th term is 31 and 15th term is 46. Find the series?

Options:
  1.    4, 7, 10
  2.    4, 6, 8
  3.    5, 8, 11
  4.    7, 11, 13
  5.    None of these
Answer: Option A
 -  The 10th term is 31

31 = a + (10 - 1) d

46 = a + (15 - 1) d

Solving these equations  a=4 and d=3

Series 4, 7, 10

Question 5.

In an A.P T4:T7::2:3 then find T3:T11?

Options:
  1.    12 : 13
  2.    5 : 13
  3.    22 : 21
  4.    6 : 7
  5.    None of these
Answer: Option B

Question 6.

Find the sum of the first 30 terms of the progression 5+8+11+....?

Options:
  1.    1455
  2.    3450
  3.    3600
  4.    4000
  5.    None of these
Answer: Option A
 -  a = 5,    d = 3,    n = 30

Sum of 30th numbers is 1455