Respuesta :
Any two-digit number beginning with a 1 is unique (and all special numbers have at least one 1). There are nine 2-digit numbers with the ones digit 1, and nine more 2-digit numbers with the tens digit 1 (except for 11, which has already been included because its ones digit is 1). As a result, there are 9+9=18 exceptional two-digit numbers.
What is special number called?
- When the total of the factorial of digits equals the original number, the number is known as a special number (given number).
- Another special number is to add twice the tens digit to the units digit, then add this to the product of the digits to go back to the original number.
- So you already know that the second digit in a two-digit number is always 8.
- If all of the digits in a number are the same, we call it a special number. Special numerals include 1, 11, 1111, and so on. The special numbers are counted in the following order: 1, 11, 111, 1111, 2, 22, 222, 2222, 3, 33, 333, 3333, and so on.
To learn more about special numbers visit:
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