Count by 1665 (Skip Counting by 1665s)

Count by 1665

Here we will show you how to count by 1665, discuss counting by 1665 patterns, and tell you why knowing how to count by 1665 matters. To start off, note that Count by 1665 means counting in 1665s, or count by one thousand six hundred sixty-fives, and it is also called skip counting by 1665.

How to count by 1665
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 1665, we count 1665, 3330, 4995, 6660, and so on.

In other words, to count in intervals of 1665 or skip counting by 1665, we start with 1665 and then add 1665 to get the next number, and then continue adding 1665 to the previous number to keep counting by 1665, like this:

1665
1665 + 1665 = 3330
3330 + 1665 = 4995
4995 + 1665 = 6660
6660 + 1665 = 8325
...

You can of course skip count by 1665 forever, so it is impossible to make a list of all numbers, but below is a Count by 1665 Chart of the first 100 numbers to get you started.

Looking at the chart above, you will see that the first column has the first ten numbers you get when you skip count by 1665, the second column has the next ten numbers you get when you skip count by 1665, and so forth.

Count by 1665 Patterns
We organized the Skip Counting by 1665s Chart above in 10 rows and 10 columns so you can easily identify patterns.

Skip counting always creates patterns. Figuring out these patterns may help you if want to count by 1665, but don't have the Counting by 1665s Chart above. Obviously, one pattern with counting by 1665s is that the number increases by 1665.

Furthermore, if you look at each row above, each number in the row has the same last digit (ones place). That means that every tenth number has the same last digit.

If you look down the columns, you will see that the last digit (ones place) repeats itself in blocks of 2 over and over. The pattern of the last digit when you count by 1665 goes 5, 0 and 5, 0 and so on for as long as you count by 1665.

Why Count by 1665?
We think that understanding and learning about skip counting by 1665 is important, because it teaches you how the arithmetic operations fit together. Below are some examples of what we mean.

When you count by one thousand six hundred sixty-five, you are also creating a list of multiples of 1665 that you can use in math when you need the least common multiple. 1665 times n equals the nth multiple or skip count of 1665.

When you skip count by 1665, you are also creating a list of numbers that 1665 is divisible by. On top of that, skip counting by 1665 is the same as making the 1665 times table.

Skip Counting
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Count by 1666
Here is the next number on our list that we used to skip count.