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Fractal
- Master | Next Rank: 500 Posts
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If the units digit of integer n is greater than 2, what is the units digit of n?
(1) The units digit of n is the same as the units digit of n^2
(2) The units digit of n is the same as the units digit of n^3
solution according to OG:
in statement (2), 5 and 6 are the only numbers which, when cubed, will both have 5 or 6 respectively in their units digits.
BUT what about 4 and 9?
Thx,
fractal
(1) The units digit of n is the same as the units digit of n^2
(2) The units digit of n is the same as the units digit of n^3
solution according to OG:
in statement (2), 5 and 6 are the only numbers which, when cubed, will both have 5 or 6 respectively in their units digits.
BUT what about 4 and 9?
Thx,
fractal
