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Q: What is the formula to find number of three digit numbers such that sum of the squares of any two digits is equal to third digit?

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73 is the largest two-digit number that is prime and has prime numbers for both of its digits.

Assuming you are treating each number as a number and not as an individual unit, the numbers you can make from these digits are 899, 989 and 998.

73 is the largest 2 digit number that is both prime and has prime numbers for both of its digits.

It would probably refer to a digit that is a prime number, or a composite number. Note that mathematicians normally talk about prime and composite NUMBERS, not individual digits.

You can check which number from 1 to a 100 are squares of other numbers for yourself. Here's how: Start with 1 and count up, squaring the number and recording the result. Example: 12 = 1 22 = 4 32 = 9 . . . 102 = 100 The number 1, 3, 9 . . . 10 are squares Now, fill in the rest

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Digits is how many numbers you have in a number. If you have the number 4 it has one digit if you have the number 20 it has two digits and if you have the number 558 it has three digits. So basically in the number 1085 it has 4 digits because there is 4 numbers in it, the numbers are 1,0,8 and 5. Hoped you understand.

No. Perfect squares as the squares of the integers, whereas irrational squares as the squares of irrational numbers, but some irrational numbers squared are whole numbers, eg √2 (an irrational number) squared is a whole number.

In the complex field, every number is a square so there are no numbers that are not squares. If the domain is reduced to that of real numbers, any negative number is not a square. However, the term "square numbers" (not number's!) is often used to refer to perfect square numbers. These are numbers that are squares of integers. Therefore the squares of fractions or irrational numbers are non-squares.

In the complex field, every number is a square so there are no numbers that are not squares. If the domain is reduced to that of real numbers, any negative number is not a square. However, the term "square numbers" (not number's!) is often used to refer to perfect square numbers. These are numbers that are squares of integers. Therefore the squares of fractions or Irrational Numbers are non-squares.

The sum of the squares of the digits of 13 is 12 + 32 = 10. The sum of the squares of the digits of this result is 12 + 02 = 1. Because this process results in a 1, this number is a happy number.

roman numbers............

9631. The sequence consists of the prime numbers which, when their digits are reversed, are perfect squares.

Armstrong numbers are the sum of their own digits to the power of the number of digits.

squares

In the numbers 1-9 each number has 1 digit and there are 9 of them, so that's 9.In 10-99 each number has 2 digits, and there are 90 of them: 2x90 = 180There are 900 three digit numbers [100 through 999]: 2700 digits.There are 9000 four digit numbers: 36000 digits.90,000 numbers with five digits: 450,000 digits.900,000 numbers with six digits: 5,400,000 digits.Then 1 number with seven digits: 7 digits.Add them up and you have 5,888,896 digits.

because they are numbers.........number is the scieentific name for digits.

A number with 22 DIGITS (not numbers) is of the order of a sextillion.

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