There are 5 numbers of 1 digit, 25 numbers of 2 digits, and 75 numbers of 3 digits. This makes 105 numbers in all.
345
There are infinitely many such numbers.
>500
3, 9, 27, 81, 243
Infinitely many.
99
There are 499 whole numbers that fit those conditions.
50
infinite-500
They are 210, 330, 390 and 462.
To determine the number of numbers that can be formed using the digits 1, 2, 3, 4, 5, and 6 without repetitions and less than 500, we first consider the hundreds place. Since the number has to be less than 500, the hundreds place can only be filled with 1, 2, or 3. For the tens and units place, any of the remaining digits can be used. Therefore, there are 3 choices for the hundreds place, 4 choices for the tens place, and 3 choices for the units place, giving a total of 3 x 4 x 3 = 36 numbers that can be formed.
None. There is only one number in 500. That number is "500" and it is not a prime number.There are 94 prime numbers that are smaller than 500.
There are 3 prime numbers between 70 and 80: 71 73 79.
There are 5 numbers of 1 digit, 25 numbers of 2 digits, and 75 numbers of 3 digits. This makes 105 numbers in all.
345
250 less than 500 = 500 - 250 500 - 250 = 250