Count by 1620 (Skip Counting by 1620s)

Count by 1620

Here we will show you how to count by 1620, discuss counting by 1620 patterns, and tell you why knowing how to count by 1620 matters. To start off, note that Count by 1620 means counting in 1620s, or count by one thousand six hundred twenties, and it is also called skip counting by 1620.

How to count by 1620
Normally, we would count by 1 like this: 1, 2, 3, 4, etc., but when we count by 1620, we count 1620, 3240, 4860, 6480, and so on.

In other words, to count in intervals of 1620 or skip counting by 1620, we start with 1620 and then add 1620 to get the next number, and then continue adding 1620 to the previous number to keep counting by 1620, like this:

1620
1620 + 1620 = 3240
3240 + 1620 = 4860
4860 + 1620 = 6480
6480 + 1620 = 8100
...

You can of course skip count by 1620 forever, so it is impossible to make a list of all numbers, but below is a Count by 1620 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 1620, the second column has the next ten numbers you get when you skip count by 1620, and so forth.

Count by 1620 Patterns
We organized the Skip Counting by 1620s 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 1620, but don't have the Counting by 1620s Chart above. Obviously, one pattern with counting by 1620s is that the number increases by 1620.

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 1 over and over. The pattern of the last digit when you count by 1620 goes 0 and 0 and so on for as long as you count by 1620.

Why Count by 1620?
We think that understanding and learning about skip counting by 1620 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 twenty, you are also creating a list of multiples of 1620 that you can use in math when you need the least common multiple. 1620 times n equals the nth multiple or skip count of 1620.

When you skip count by 1620, you are also creating a list of numbers that 1620 is divisible by. On top of that, skip counting by 1620 is the same as making the 1620 times table.

Skip Counting
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Count by 1621
Here is the next number on our list that we used to skip count.