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Q: What two prime numbers make 123 using times tables?

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No 5291 is not a prime using 2 numbers. It is a prime using three numbers.

I can find 13 ways, not just 7, to make 60 from adding numbers in the 4, 5 and 9 times tables.

They are: 2^4 times 3 times 5^2 times 7 = 8400

This week I learned my 4,5 and 6 times tables.

To factorise is to find the numbers that divide into the original number by only using prime numbers. For example factorise 20 = 2 times 2 times 5

Prime numbers have one factor pair, hence one rectangle.

2x2x3 = 12

21

3 x 5 x 11

Divide prime numbers into it. Start with 2. Do that four times. Then try 3. Stop.

No prime power exists since there are no duplicate prime numbers in the prime factorization.

No prime power exists since there are no duplicate prime numbers in the prime factorization.