There are 35C4 = 35*34*33*32/(4*3*2*1) = 52,360 combinations.
There are 840 4-digit combinations without repeating any digit in the combinations.
There are only five combinations: 1234, 1235, 1245, 1345 and 2345.
9,876,543,210 9876543210
Decimal numbers that never end but that end up having a repeating pattern are called recurring decimals or repeating decimals.Examples would be 1/3 = 0.33333333...or 452/555 = 0.8144144144144144... (where 144 is the repeating pattern).Reaching that repeating pattern is known as becoming periodic. Only rational numbers will have a repeating pattern. (The repeating pattern may be 00000, as in 4/2 = 2.00000... .)If a decimal number continues forever without having a repeating pattern, then it is a irrational number. One example of a number that continues forever without repeating would be π (pi) which continues infinitely without repeating.Pi is also referred to as a transcendental number.
24 without repeating digits: 1938 1983 1398 1389 1893 1839 9138 9183 9318 9381 9813 9831 3198 3189 3918 3981 3819 3891 8193 8139 8913 8931 8319 and 8391.
There are 840 4-digit combinations without repeating any digit in the combinations.
11
93,876
There are only five combinations: 1234, 1235, 1245, 1345 and 2345.
The number of combinations, denoted by 11C6 is 11!/[6!*(11-6)!] = 11*10*9*8*7/(5*4*3*2*1) = 462
6
Without repeating, 4. With repeating, 8.
12354.
There are 46C5 = 46*45*44*43*42/(5/4/3/2/1) = 1,370,754 of them and I am not stupid enough to try and list them. You are welcome to try, though.
1,023,456,789
5040
From 1 to 20, you can pull out 15,504 different groups of 5 numbers, and each group can be lined up in 120 different orders.