TCS Company Numerical Ability Time and Work

. Except for the first two numbers, every number in the sequence –1, 3, –3 . . . is the product of the two immediately preceding numbers. How many numbers of this sequence are odd?
a)One b)Two c)Three d) Four e) None of the Above

Read Solution (Total 5)

none of the above
as all number of sequence
1,3,3,9,27,81.....
are odd.
12 years agoHelpfull: Yes(10) No(0)

I think Smita is right.

none of the above
as all number of sequence
1,3,3,9,27,343,.....
are odd.
12 years agoHelpfull: Yes(4) No(0)
none of d above
11 years agoHelpfull: Yes(0) No(0)
none of the above
as all number of sequences
1,3,3,9,27,243,6561....... all are odd
(1*3=3, 3*3=9 (3*9=27) (9*27=243) (27*243=6561)
10 years agoHelpfull: Yes(0) No(0)
none of the above
9 years agoHelpfull: Yes(0) No(0)

TCS Other Question

. Scott starts jogging from point X to point Y. A half-hour later his friend Garrett who jogs 1 mile per hour slower than twice Scott’s rate starts from the same point and follows the same path. If Garrett overtakes Scott in 2 hours, how many miles will Garrett have covered?
a) 11/5 b) 10/3 c) 4 d) 6 e) 20/3
Some birds are sitting in an oak tree. Ten more birds land. More birds arrive until there are a total of four times as many birds as the oak tree had after the ten landed. A nearby maple tree has sixteen fewer than twelve times as many birds as the oak tree had after the ten landed. If both trees now have the same number
of birds, how many birds were originally in the oak tree before the first 10 landed?
a)4 b) 7 c) 16 d) 24