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Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.
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5 occupies position number 5 in the Fibonacci sequence.
The number that occupies the 25th position, 75025, ends with 25 (which is 5^2 of course).
The125th position is occupied by a number ending in 125 (or 5^3): 59425114757512643212875125.
Ditto for 625 and 3125, which are 5^4 and 5^5 respectively
But this curious rule seems to start breaking down for powers of 5 greater than 5.