Q: What prime numbers can you use to multiply 4 times to reach a total of 1225?

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They are: 7 times 13 = 91

They are 1 times 19 = 19 which is a prime number

They are: 1 times 19 = 19 which is a prime number

Only once - thanks to the unique prime factorisation theorem.

252

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Three times three times three.

They are: 7 times 13 = 91

They are 1 times 19 = 19 which is a prime number

They are: 1 times 19 = 19 which is a prime number

There are no two prime numbers that multiply to 24. You need four numbers (even though one appears 3 times).

They are: 1 times 137 = 137 which is a prime number

They are: 1 times 107 = 107 which is also a prime number

Only once - thanks to the unique prime factorisation theorem.

252

three times 2 and two times 5 that is 2*2*2*5*5

They are only: 1 times 2003 = 2003 because it is a prime number

Yes! 2 times 5 equals 10. 10 times 3 equals 30. So, the prime numbers that multiply together to make 30, are, 2, 3 and 5.