tgr3bwkhw
Wiki User
∙ 10y agoThere 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.
There is no limitation given to the number of digits in the number, thus: For 3 digit numbers: to be less than 500 the first digit can be only one of {1, 2, 3, 4} leading to 4 × 5 × 4 = 80 numbers For 2 digit numbers: they are all less than 500, and there are 6 × 5 = 30 numbers For 1 digit numbers: they are all less than 500, and there are 6 numbers Thus there are in total 80 + 30 + 6 = 116 numbers that can be made form the digits {1, 2, 3, 4, 5 ,6} without repetitions that are less than 500.
50
infinite-500
12 numbers.
They are 210, 330, 390 and 462.
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