Aptitude - Numbers - Discussion

Discussion Forum : Numbers - General Questions (Q.No. 96)
96.
How many terms are there in the G.P. 3, 6, 12, 24, ... , 384 ?
8
9
10
11
7
Answer: Option
Explanation:

Here a = 3 and r = 6 = 2. Let the number of terms be n.
3

Then, tn = 384     arn-1 = 384

3 x 2n - 1 = 384

2n-1 = 128 = 27

n - 1 = 7

n = 8

Number of terms = 8.

Discussion:
6 comments Page 1 of 1.

Tanu said:   4 years ago
GP means Geometrical progression.

Priya singh said:   4 years ago
@Kunal.

It is a Geometrical progression (G.P).

Kunal said:   4 years ago
What is G. P. In this question? Please explain.

Pranitha said:   5 years ago
128 = (2*2*2*2*2*2*2).
Like that 128 = 2^7.

LOGHA PRAKASH said:   6 years ago
Can someone tell me how to convert like 128 = 2^7 quickly?

Sachinaeron said:   8 years ago
Please explain this question in shortcut method.

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