Three times three times three.
23 times 5
A prime number times a prime number is a composite number. Since prime numbers, except for 2, are odd numbers, a prime number times a prime number is usually an odd number. It will only be an even number if one of the prime numbers is 2. A prime number times a prime number will be a number with four factors unless both prime numbers are the same, in which case it will be a square number with only three factors.
yup, the three numbers are all prime
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
13.
18 = 2 x 3 x 3
63 = 3*3*7
5*5*5 = 125
number of prime numbers which are in the seven times tables: 1 prime numbers are in the seven times tables: 7 only
Divide prime numbers into it. Start with 2. Do that four times. Then try 3. Stop.
2 x 5 x 7 = 70