= 715. Another approach: Consecutive odd numbers after 478 form an arithmetic progression (A.P.) sequence wth first term 479 and common difference of 2.

Odd Natural Numbers (O): A system of naturals numbers, which are not divisible by 2 or are not multiples of 2, is called a set of odd numbers. It is denoted by ‘O’. Thus, O = {1, 3, 5, 7, 9, 11…} Taking together the odd and even numbers, we get Natural Numbers.

The number whose unit digit is other than 0,2,4,6,8 are odd numbers. The smallest even natural number is 2 and smallest odd natural number is 1.

The first n odd natural numbers are given by 1,3,5,7,9…… (2n – 1) and this forms an AP. The sum of first n odd natural numbers is n2.

The first ten odd natural numbers are 1,3,5,7,9,11,13,15,17,19. Arithmetic mean is calculated by adding all the observations by the total number of observations.

Answer: (2) There are 50 odd numbers from 1 to 100. Avaregae sum = 50.

Answer. Step-by-step explanation: Therefore, 4000000 is the sum of first 2000 odd numbers.

First 60 Odd Numbers Chart (1 – 119)
41	43	51
61	63	71
81	83	91
101	103	111

The idea is the sum of first n odd number is n2, for find the Average of first n odd numbers so it is divide by n, hence formula is n2/n = n. it take O(1) time.

420.5 is an average of two given numbers 333 & 508.

The average of odd numbers till a given odd number is a simple concept. You just need to find odd numbers till that number then take their sum and divide by the number. If average of odd number till n is to be found. Then we will find odd numbers from 1 to n add then divide it by the number of odd number.

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.

Therefore, 289 is the sum of first 17 odd numbers.

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

20 is an average of first 20 odd numbers mentioned in the below table, by substituting the total sum and count of numbers in the formula.

Odd numbers are whole numbers that cannot be divided exactly into pairs. Odd numbers, when divided by 2, leave a remainder of 1. 1, 3, 5, 7, 9, 11, 13, 15 … are sequential odd numbers. Odd numbers have the digits 1, 3, 5, 7 or 9 in their ones place.

The number series 1, 3, 5, 7, 9, . . . . , 25. Therefore, 169 is the sum of first 13 odd numbers.

Even numbers always end with a digit of 0, 2, 4, 6 or 8. 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 are even numbers.

In this approach, we analyze the number at “ones” place in an integer to check if the number is even or odd. All the numbers ending with 1,3,5,7 and 9 are odd numbers. All the numbers ending with 0,2,4,6 and 8 are even numbers. For example, numbers such as 14, 26, 32, 40 and 88 are even numbers.

825 is an odd number.

A: No, the number 788 is not an odd number – it is an even number.

792 is not an odd number.

1

The first ten odd natural numbers are 1,3,5,7,9,11,13,15,17,19.

Sum of first odd number = 1. Sum of first two odd numbers = 1 + 3 = 4 (4 = 2 x 2). Sum of first three odd numbers = 1 + 3 + 5 = 9 (9 = 3 x 3). Sum of first four odd numbers = 1 + 3 + 5 + 7 = 16 (16 = 4 x 4).

Therefore, the sum of the first 20 even numbers is 420.

Therefore, the sum of the first 25 even numbers is 650.

Sum of first n even numbers = n * (n + 1).

Some examples of even numbers are 2, 4, 6, 8, 10, 12, 14, 16. These are even numbers as these numbers can easily be divided by 2. It should be noted that the smallest positive even natural number is 2. If you pick a number that cannot be divided by 2 is known as an odd number.

2

For mathematicians the answer is easy: zero is an even number. Because any number that can be divided by two to create another whole number is even.

Zero is an even number. In other words, its parity—the quality of an integer being even or odd—is even. This can be easily verified based on the definition of “even”: it is an integer multiple of 2, specifically 0 × 2.

Natural numbers are all positive numbers like 1, 2, 3, 4, and so on. They are the numbers you usually count and they continue till infinity. Whole numbers are all natural numbers including 0, for example, 0, 1, 2, 3, 4, and so on. Integers include all whole numbers and their negative counterpart.

Solution: 0 is not a natural number. It is a whole number.

It means if the result is in fraction or decimal, then they are not considered as natural and whole numbers. But 5/2 = 2.5 is neither a natural nor a whole number.

Natural Numbers (N), (also called positive integers, counting numbers, or natural numbers); They are the numbers {1, 2, 3, 4, 5, …} This includes all numbers that can be written as a decimal. This includes fractions written in decimal form e.g., 0.5, 0.75 2.35, ⁻0.073, 0.3333, or 2.142857.

One of the basic and main differences between natural and whole numbers is that natural numbers do not include the number 0 and have the smallest number as 1. Whereas, whole numbers include 0 and have the smallest number as 0.

What are Whole Numbers?

• There is no ‘largest’ whole number.
• Except 0, every whole number has an immediate predecessor or a number that comes before.
• A decimal number or a fraction lies between two whole numbers, but are not whole numbers.

The whole numbers are the numbers 0, 1, 2, 3, 4, and so on (the natural numbers and zero). Negative numbers are not considered “whole numbers.” All natural numbers are whole numbers, but not all whole numbers are natural numbers since zero is a whole number but not a natural number.

Answer. Whole numbers are natural numbers except 0. Smallest Natural number is 1. Therefore the difference between smallest Whole Number & Natural number is 1.

Answer: 1.) 0. it is the smallest number in the whole numbers.

So zero (0) is the smallest one-digit whole number and one(1) is the smallest one-digit natural number.