How many 3-digit numbers greater than 500 contain the digit 9 appearing at least once?
Number Systems is a value used for counting and measuring objects, and for performing arithmetic calculations. It is a method of writing for expressing numbers. It provides a unique representation to every number and presents the arithmetic and algebraic form of the number. It enables us to operate arithmetic operations like addition, subtraction, multiplication, and division. Show
An equation is a declaration that links two algebraic expressions of equal values with the ‘=’ sign. For example: In equation 8x + 4 = 7, 8x + 4 is the left-hand side expression and 7 is the right-hand side expression linked with ‘=’ sign. What is a Number?A word or symbol that indicates an amount is known as a number. The numbers 4, 6, 8, etc. are even numbers and 3, 5, 7, etc. are odd numbers. A number is a value formed by the combination of digits. These numbers are used to express algebraic quantities. An integer is an indication from a set of 10 characters ranging from 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. Any amalgamation of integers represents a number. The size of a Number depends on the count of digits that are used for its development. For Example: 126, 128, 0.356, -12, 78, 94 etc. Whole Numbers Whole Numbers are the same as Natural Numbers, but they also include ‘zero’. We can donate whole numbers by the symbol W. Whole numbers include all the natural numbers and 0 (zero). We know that the numbers 1, 2, 3, 4, 5 are natural numbers. And the numbers 0, 1, 2, 3, 4, 5, 6 .. etc., are the whole numbers as they include 0 as well. Whole numbers are represented as W and Natural numbers are represented as N. Therefore, it is correct to say, W= {N} + 0 On the number line, everything which is on the right side of 0 (including 0) comes under whole numbers. How many times does the digit 1 appear in the numbers 1 to 1,000?Solution:
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How many three digit numbers greater than 500 have at least two of their digits the same?The answer is 140.
How many 3If what you want are all possible three digit numbers with no repetition of the digits then you have 10 choices for the first digit, you have 9 choices for the 2nd digit, and you have 8 choices for the 3rd digit giving you 10x9x8 = 720 in all.
How many different three digit numbers larger than 500 can be formed?The number of three-digit numbers which are greater than 500 is 499 (from 501 to 999, inclusive). A. all digits are distinct = 5*9*8 = 360 (first digit can have only five values 5, 6, 7, 8, or 9);
How many times does the digit 3 appear from 1 to 500?Therefore when we calculate digits from 1 to 500 the digit 3 appear 200 times. number 3 in hundredth's place in the digits from 300 to 399.
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