5
1234, 1243, 1324, 1342, 1423, 1432,
2134, 2143, 2314, 2341, 2413, 2431,
3124, 3142, 3214, 3241, 3412, 3421,
4123, 4132, 4213, 4231, 4312, 4321.
There can be only one combination with four digits. Changing their order gives permutations, NOT combinations.The following are possible combinations:1 digit: 1, 4, 6.2 digit: 11, 14, 16, 463 digit: 114, 116, 146.
There are 840 4-digit combinations without repeating any digit in the combinations.
There are 8 different combinations.There are 145 permutations that total 14.Not asked, but answered for completeness sake; there are 1296 possible permutations of four dice, making the probability of a sum of 14 being 145 in 1296 or about 0.1119.
14
Any pair of digits (not including 0), can be used to generate 14 four-digit numbers. If one of the digits is 0, only seven will start with a non-zero digit.
Four. They are 14, 21, 28, and 42.
Combinations - album - was created on 2007-08-14.
1 and 11 and 21 and 31 and 42 and 12 and 22 and 32 and 43 and 13 and 23 and 33 and 44 and 14 and 24 and 34 and 416 combinations
Eight hundred and twenty-four abc c=1/2a b=1/2c So lowest is b so start with b=1 412 = 7 now make b=2 824 = 14
There is no one-digit number that is equal to both 14 and 28.
With 4 digits you can have 24 = 16 combinations. 1 combination with 0 digits; 4 combinations with 1 digit: 1, 2, 4 and 8 6 combinations with 2 digits: 12, 14, 18, 24, 28 and 48 4 combinations with 3 digits: 124, 128, 148 and 248 1 combination with all 4 digits. In a combination the order of digits is not relevant so that 124 is the same as 142.
My entry in the contest is: 14 .It's the GCF of 14, 28, 42, 56, 70, 84, and 98.