 # What is the sum of odd numbers from 1 to 30?

## What is the sum of odd numbers from 1 to 30?

900The sum of the first 30 odd numbers is 900. We start by identifying the first 30 odd numbers: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29,…

## What is the sum of the first 21 odd numbers?

441For example, if we put n = 21, then we have 21 x 21 = 441, which is equal to the sum of the first 21 odd numbers.

## What is the sum of all of the odd numbers from 1 to 59?

3481The sum of all of the odd numbers from 1 to 59 is 3481.

## Is the number 39 odd?

Important Notes: As 39 is an odd number, all its factors will be odd. 39 is a non-perfect square number. Thus, it will have an even number of factors.

## What are the odd numbers 1 to 30?

1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31 are odd numbers.

## What is the sum of first 30 natural numbers *?

465So, The sum of 1 to 30 is 465.

## What is the sum of first 20 odd numbers?

400Answer: The sum of the first 20 odd natural numbers is 400.

## What are multiples of 39?

Multiples of 39: 39, 78, 117, 156, 195, 234, 273, 312, 351, 390 and so on.

## What are the factors of 21?

Factors of 21Factors of 21: 1, 3, 7 and 21.Negative Factors of 21: -1, -3, -7 and -21.Prime Factors of 21: 3, 7.Prime Factorization of 21: 3 × 7 = 3 × 7.Sum of Factors of 21: 32.

## Is 21 an odd number?

The odd numbers from 1 to 100 are: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99.

## What is the sum of first 20 natural number?

210=210. Q. Find the sum of the first ‘n’ natural numbers and hence find the sum of first 20 natural numbers. Q.

## Which of the following is the sum of the first 20 natural number?

So, now the correct option is A) 210.

## What is the sum of natural numbers from 21 to 50?

Explanation: The sum of natural numbers from 1 to some natural number n is given by the formula: n(n+1)/2. Therefore, the sum of natural numbers between 21 to 50 is 1065.

## How do you find the sum of an odd number?

We can also the sum of n odd numbers formula can be expressed as:Sum of n odd numbers = n2 where n is a natural number. Sum of odd numbers from 1 to l= [(1+l)/2]2 To find the sum of all consecutive odd numbers between 1 and l, add 1 and l. Sum of squares of n odd numbers12 + 32 + 52 +………..

## Is the number 39 a multiple of 9?

The sum of the first 5 multiples of 39 is 585 and the average of the first 5 multiples of 39 is 117. Multiples of 39: 39, 78, 117, 156, 195, 234, 273, 312, 351, 390 and so on….List of First 20 Multiples of 39.39 × 1 = 3939 × 11 = 42939 × 9 = 35139 × 19 = 74139 × 10 = 39039 × 20 = 780

## What is the sum of 21?

32Therefore the factors of 21 are 1, 3, 7 and 21. All that is left to do is to work out the sum of these numbers, that is to add them all up. 21+1 + 3 +7 = 32Therefore, the sum of the factors of 21 is 32.

## What is the sum of the factors of 21?

32The sum of all factors of 21 is 32 and its factors in Pairs are (1, 21) and (3, 7).

## Does the sum of the first 20 natural numbers is 210?

Here there are 20 terms. Also, n here is the number of terms and that is equal to 20. So, now the correct option is A) 210. Note: It is important to keep in mind that zero is not the natural number.

## What is the odd of 21?

List of Odd Numbers1319212339414359616379818399

## Is 21.5 an odd number?

21 is an odd number.

## How do you find the sum of natural numbers?

The formula of the sum of first n natural numbers is S=n(n+1)2 . If the sum of first n natural number is 325 then find n.

## What are the odd numbers from 1 to 50?

The odd numbers from 1 to 100 are: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99.

## Which of the numbers have 39 as a multiple?

Table of Factors and MultiplesFactorsMultiples1, 2, 3, 4, 6, 9, 12, 18, 3636721, 3737741, 2, 19, 3838761, 3, 13, 393978

## How do you find the sum of 20 odd numbers?

The first 20 odd natural numbers are given by : 1,3,5,7,9……,37,39. Put all the values in the formula, Therefore,The sum of first 20 odd natural numbers is 400.

## What numbers added together equal 21?

List of Factor Pairs for 211 x 21 = 21.3 x 7 = 21.7 x 3 = 21.21 x 1 = 21.

## What are multiples of 21?

Solution: The first 10 multiples of 21 are, 21, 42, 63, 84, 105, 126, 147, 168, 189 and 210.

## How do you get 21?

If a player’s first two cards are an ace and a “ten-card” (a picture card or 10), giving a count of 21 in two cards, this is a natural or “blackjack.” If any player has a natural and the dealer does not, the dealer immediately pays that player one and a half times the amount of their bet.

## What two numbers add up to 21?

6+7+8=21. 5+7+9=21.