Posted by **Jennifer** on Tuesday, May 1, 2012 at 11:29pm.

The 6th term of an A.P is twice the third and the first term is 3. Find the common difference and the 10th term.

- Utech -
**Steve**, Wednesday, May 2, 2012 at 10:23am
3+5d = 2(3+2d)

3+5d = 6+4d

d = 3

So, the sequence is

3, 6, 9, 12, 15, 18, 21, 24, 27, 30 ...

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