In this post we are going to learn how to factor into prime numbers. First, let’s look at what factoring is: writing a number as the multiplication of other numbers. For example, let’s factor the number 12. 12 = 3 x 4 12 = 2 x 6 12 = 1 x 12 All 3 cases are […]

Apr 19

Mar 10
In this post we will learn the criteria for the divisibility of 5. How can we know without having to do the division? Here we will show you the easiest way. Criteria of dividing by 5: To determine if a number is divisible by 5, that number must end in 0 or 5. If it ends with another […]

Feb 20
Why is it useful to know the divisibility of a number? It allows us to determine whether a number is divisible by another number without having to divide them. In this post we are going to learn the divisibility guidelines for 9. Criteria for the divisibility by 9: A number is divisible by 9 if […]

Feb 01
How can we find out if a number is divisible by 7? In this post we are going to look at the divisibility guidelines for the number 7. One of the ways to find out is by dividing the number by 7. If the remainder is zero, we know that the number is divisible by […]

Jan 09
Divisibility? What is that? Divisibility is when we divide number A by number B and the remainder is zero. In this case we say that A is divisible by B. For example, is 1368 divisible by 6? To find out we divide 1368 by 6: When we divide it we see that the remainder […]