TCS Company Logical Reasoning Number Series

3, 15, x, 51, 53,159,161
a)17 b)34 c)54 d)112

Read Solution (Total 3)

Ans: a)17
Explanation: 3*5=15 | 15+2= 17 | 17*3=51 | 51+2= 53 | 53*3 = 159 | 159+2=161
9 years agoHelpfull: Yes(24) No(0)

why 15 is the second term.
9 years agoHelpfull: Yes(0) No(3)
17.because 3*5=15,15+2=17,17*3=51,51+2=53......
9 years agoHelpfull: Yes(0) No(1)

TCS Other Question

N is an integer and N>2, at most how many integers among N + 2, N + 3, N + 4, N + 5, N + 6, and N + 7 are prime integers? A car manufacturer produces only red and blue models which come out of the final testing area at random.
What are the odds that five consecutive cars of same color will come through the test area at any one time?
a)1 in 16 b)1 in 125 c)1 in 32 d)1 in 25