Posted by Anonymous on Monday, February 4, 2013 at 11:11am.
Find five numbers in A.P. whose sum is 12.5 and the ratio of first to the last is 2 : 3.

maths  Steve, Monday, February 4, 2013 at 11:14am
5/2 (2a+4d) = 25/2
a/(a+4d) = 2/3
a=2 d=1/4
2, 2¼, 2½, 2¾, 3, ...
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