If a number ends in 5 or 0, that number is evenly divisible by 5. So, the number 35, 45, 55, 60, 70 and 80 are just a few of the numbers that can be divided by 5 without having a remainder. This will influence someone finding the factors of that number because you would be trying to find those numbers that can be divided by a number without having a remainder. This would make it easy since you would automatically know that 5 would be a factor of this number like 35. You would then have to find its factor partner. For 35, 5’s factor partner is 7 because 5 times 7 is 35.