4 ms·
1 is not really a prime factor. But anyway, if you consider it a prime factor for 12, you should consider it a prime factor of 10 too.
by yiyus 8y ago
1 is not really a prime factor. But anyway, if you consider it a prime factor for 12, you should consider it a prime factor of 10 too.
- cup-of-tea 8y agoI think that was actually a joke. He surreptitiously only mentioned the prime factors of ten (2 and 5) and then listed all the factors of twelve (1, 2, 3, 4, 6, 12). Ten, of course, has four factors: 1, 2, 5, 10 and twelve only has two prime factors as well: 2 and 3.