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# What is the sum of counting numbers from 1 to 20?

Updated: 9/27/2023

Wiki User

6y ago

The sum of the numbers from 1 to 20 inclusive is 220.

Wiki User

6y ago

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Q: What is the sum of counting numbers from 1 to 20?
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### What is the sum of the first six counting numbers?

The sum of the first six counting numbers (1-6) is 19.

### What is the sum of first 10 counting numbers?

The sum of the first 10 counting numbers (1-10) is 51.

### What is the sum the first 100 counting number?

The sum of the first 100 counting numbers (1-100) is 5,001.

### What is the sum of the first 5 counting numbers?

1+1+1+1+1+=5 * * * * * The question did not ask for the sum of the first counting number five times! The sum of the first 5 counting numbers is 1+2+3+4+5 = 15. Such sums are known as triangular numbers.

### What is the sum of the first 500 couting numbers?

The sum of the first 500 counting numbers (1-500) is 125,001.

### What is the sum of the first twenty counting numbers?

20*(20+1)/2 = 210 If you want to see how this works, or even the beauty in numbers, you can do so in MS Excel. In cell A1 put "=ROW()" B1: "=SUM(A\$1:A1)" C1: "B1/A1". Then, select and copy those three cells. Paste the content in any number of rows down in those three columns. Be sure to note the following patterns: Every 20 numbers, the one's digit repeats itself in the sum column (B column), The sum of the first 10 numbers is 55, the first 100 is 5050, 1000 is 500500.

1 and 3

105

1, 2, 3, and 5

### What is the sum of the first three squared numbers?

I assume you mean the first three "counting" (ordinal) numbers, which are 1, 2, and 3. The sum is therefore 1 + 4 + 9 = 14.

### The sum of two numbers is 21 The difference of the two numbers is19 What are the two numbers?

20 and 1. 20 + 1 = 21 20 - 1 = 19

### How many counting numbers have four distinct nonzero digits such that the sum of the four digits is 10?

1,2,3,4 1+2+3+4=10 4 times 3 times 2 times 1 =24 24 counting numbers