- What are all the numbers added up to 100?
- What 3 numbers add up to 26?
- What is Gauss formula?
- How many times does the digit 6 appear between 1 and 100?
- How do you make 100 using numbers 1 9?
- What 4 numbers add up to 8?
- What 5 numbers add up to 31?
- What three numbers make 100?
- What 4 numbers add up to 10?
- What is the rule of 9 in math?
- How can you make 100 using four 9s?
- What 3 numbers add up to 12?
- What 4 numbers add up to 15?
- What is the sum of all numbers?

## What are all the numbers added up to 100?

The sum of the numbers 1-100 would be equal to the number of pairs (50) multiplied by the sum of each pair (101), or 50 x 101 = 5,050..

## What 3 numbers add up to 26?

The last number is 2x+6 and x=4 , so 2(4)+6=14 . 14+8+4=26. Therefore the answers are 4,8, and 16. The three numbers are 4,8and14 .

## What is Gauss formula?

Gauss’s method forms a general formula for the sum of the first n integers, namely that 1+2+3+\ldots +n=\frac{1}{2}n(n+1) One way of presenting Gauss’ method is to write out the sum twice, the second time reversing it as shown. If we add both rows we get the sum of 1 to n, but twice.

## How many times does the digit 6 appear between 1 and 100?

The digit 6 is used once in 100~109 (only when 106). Similarly the digit 6 is used once in 110~119(only when 116), ….

## How do you make 100 using numbers 1 9?

Our numbers 1 through 9 are. That’s almost half of 100 so we can multiply that by 2 and get 90 and now we can add back in another 1 and 9 to give the extra 10 needed to reach 100.

## What 4 numbers add up to 8?

Draw blobs (or any shapes you like) to show how these two numbers make up 8.8 = 1 + 78 = 2 + 68 = 3 + 58 = 4 + 48 = 5 + 38 = 6 + 28 = 7 + 1

## What 5 numbers add up to 31?

1, 3, 9, AND 18 MAKE 31 IN TOTAL & YOU CAN MAKE EVERY NUMBER UPTO 31 USING THEM. YOU CAN SOLVE THIS BY ADDING 18 WITH 9 & 4.

## What three numbers make 100?

There are 833 different combinations of 3 positive integers that sum to 100, like 98 +1 + 1, 53 + 37 + 10, 30 + 30 + 40, and so forth. The prime factors of 100 are 2^2 * 5^2. So, three numbers that have a product of 100 are 2*2*25.

## What 4 numbers add up to 10?

NumberRepeating Cycle of Sum of Digits of Multiples9{9,9,9,9,9,9,9,9,9}10{1,2,3,4,5,6,7,8,9}11{2,4,6,8,1,3,5,7,9}12{3,6,9,3,6,9,3,6,9}8 more rows

## What is the rule of 9 in math?

The divisibility test that an integer is divisible by 9 iff the sum of its digits is divisible by 9. SEE ALSO: Casting Out Nines, Divisibility Tests.

## How can you make 100 using four 9s?

Answer: 99 + 9/9. 99 + log₉9. 99/.99.Step-by-step explanation: Get 100 using four 9’s and some of the symbol like(+ , – ,×, ).99 + 9/9. = 99 + 1. = 100.99 + log₉9. = 99 + 1. = 100.99/.99. = 100.

## What 3 numbers add up to 12?

Solution for level Brain Out What 3 numbers add up to 12 … answer: 3+3+6=12, just follow the walkthrough =)

## What 4 numbers add up to 15?

1 and 14, 2 and 13, 3 and 12, 4 and 11, 5 and 10. But, there are only two single-digit numbers that add up to 15: 6 and 9, 7 and 8.

## What is the sum of all numbers?

For those of you who are unfamiliar with this series, which has come to be known as the Ramanujan Summation after a famous Indian mathematician named Srinivasa Ramanujan, it states that if you add all the natural numbers, that is 1, 2, 3, 4, and so on, all the way to infinity, you will find that it is equal to -1/12.