In base 10, all numbers whose last digit is a 5 or a 0
They belong to a set of numbers whose first digit is 8. There are 720 such numbers and I regret that I do not have the patience to list them all.
11, 19, 41, 61, and 89
3 digit numbers are lessthan 4 digit numbers
There is no such ratio that applies for all single-digit and double-digit integers.
In base 10, all numbers whose last digit is a 5 or a 0
They belong to a set of numbers whose first digit is 8. There are 720 such numbers and I regret that I do not have the patience to list them all.
Oh, dude, you want me to find 4-digit numbers where the digits add up to 2? That's like finding a needle in a haystack! But hey, I'm up for the challenge. The only number that fits the bill is 1001. So, there you go, one lonely 4-digit number with a digit sum of 2.
All two digit numbers which the digits add up to 11 are :- 29, 38, 47, 56, 65, 74, 83 & 92.
11, 19, 41, 61, and 89
3 digit numbers are lessthan 4 digit numbers
Forming three three digit numbers that use the numbers 1-9 without repeating, the highest product possible is 611,721,516. This is formed from the numbers 941, 852, and 763.
There are 2000 4-digit numbers that are multiples of 5, so, instead of listing them all, it is equally valid to say: Any4-digit number whose final digit is either a 5 or a 0 is a multiple of 5. Get Right? :P
There is no such ratio that applies for all single-digit and double-digit integers.
111 and 201
The largest three digit prime number whose digits are all primes is 773.
They are all single digit numbers.