5 and 13 are both prime numbers.
30
6 is the mean of the three numbers given.
The LCM of the given three numbers is 315
The least common multiple of the numbers 4, 5 and 9 is 180.
LCM is least common multiple of two or more numbers. LCM of 5 and 20 is 20.
The number you are multiplying by is the amount of 'lots' of the number you are multiplying.e.g. 5x4is the same as 4 'lots' of 5so it is 5+5+5+5and the answer is 20.e.g. 13x12is the same as 12 'lots' of 13so it is 13+13+13+13+13+13+13+13+13+13+13+13and the answer is 156.
There are 4 items to choose from, and 3 of them, so the answer is 43 = 64.
It is 20
1
2
It is: 10
60