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Find the all distinct four-digit numbers that contain only the digits 12345?
There are 625 of them - too many to list.
Write all the three digit numbers using the digits 4 6 and 8 without repeating any digit?
468, 486, 648, 684, 846, 864.
How many four digit EVEN numbers have all 4 digit distinct?
2240
Using the numbers 1 2 3 5 6 8 0 with no repetition allowed how many 4-digit numbers can be constructed if the number is even?
This is a problem involving combinations. We know we need a 4 digit number. So I'll write 4 blank spaces, to symbolize each digit. ___ ___ ___ ___ The number also has to be even. That means that the last digit must be even. (2, 4, 6, 8, 0) Your list of numbers is 1, 2, 3, 5, 6, 8, 0. How many numbers from this list will work in the last digit place? 2, 6, 8, 0. -- 4 numbers. ___ ___ ___ _4_ For the third digit, any number will work. We have 7 choices. ___ ___ _7_ _4_ for the 2nd digit, the same applies. any number from your list will work. ___ _7_ _7_ _4_ For the first digit, only 6 will work. if you put a 0 in the first digit place, it becomes a 3 digit number. _6_ _7_ _7_ _4_ Now, all we do it multiply these numbers together. 6 * 7 * 7 * 4 = 1176. This means, we can create 1176 unique 4 digit numbers that are even with the list of numbers available. 1000 1002 1006 1008 1010 1012 etc.
What are all the two digit numbers?
Any number with 2 numbers in it is a 2. Example: 95 They are numbers 10 - 99.
