I am thinking of a 5 digit number that when tripled is a perfect square.

Also, when the 5 digit number is split, the first number is double the second one. What is the five digit number?

(Splitting the 5 digit number into two numbers means 12345 into 1 and 2345 or 123 and 45.)

(In reply to Assuming Leading Zeroes by K Sengupta)

Some of the other possible solutions --- without leading zeroes:
11011 (base 2)
11223 (base 4)
11432 (base 5)
12653 (base 8)

10663 (base 12)
16090 (base 12)
14A95 (base 14)
156AB (base 16)
16ED7 (base 20)
178EF (base 22)
18IH9 (base 26)
19AIJ (base 28)
1AMLB (base 32)

Edited on July 1, 2011, 8:17 am

Posted by Dej Mar on 2011-07-01 07:23:43