perplexus.info :: Sequences : Sum from Arithmetic and Geometric

Sum from Arithmetic and Geometric (Posted on 2016-03-24)

Each of A, B and C is a positive integer such that:
20*A, 6*B and C are in arithmetic sequence, and:
20*A, 6*B and C+1 are in geometric sequence

Find the six smallest values of A+B+C

Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Solution: (Hide)

The six smallest values of A+B+C are: 100, 530, 1030, 1160, 1860, 3050.
For an explanation, refer to the solution submitted by Charlie in this location.
Also, refer to the solution submitted by broll in this location.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
I agree.	broll	2016-03-24 23:07:43
computer solution	Charlie	2016-03-24 15:32:13
re(2): Possible Solution	Charlie	2016-03-24 15:27:09
re: Possible Solution	Brian Smith	2016-03-24 13:52:42
Possible Solution	Jer	2016-03-24 13:22:49

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