If you allow the combination comprising no digits, then 2^16 = 65536.
2 to the power 16.
If you use them only once each, you can make 15 combinations. 1 with all four digits, 4 with 3 digits, 6 with 2 digits, and 4 with 1 digit. There is also a combination containing no digits making 16 = 24 combinations from 4 elements.
A quadrillion has 16 digits.
16 digits.
The question does not specify how the the digits are to be combined: addition, multiplication, subtraction, division, power, other.
2 to the power 16.
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.
If you use them only once each, you can make 15 combinations. 1 with all four digits, 4 with 3 digits, 6 with 2 digits, and 4 with 1 digit. There is also a combination containing no digits making 16 = 24 combinations from 4 elements.
Assuming that "number" means digits and that it is permutations (rather than combinations) that are required, the answer is 816 which is 281.475 trillion (approx).
If you include the combination which comprises no numbers (the empty set), then there are 16: 1 with no digits 4 with 1 digit 6 with 2 digits 4 with 3 digits, and 1 with 4 digits.
A quadrillion has 16 digits.
16 digits.
A quadrillion is a 1 followed by 15 zeroes (1,000,000,000,000,000).Therefore, there are 16 digits in a quadrillion.
The question does not specify how the the digits are to be combined: addition, multiplication, subtraction, division, power, other.
16
there are 16 digits on a visa card
The easy answer is 0000 thru 9999, which is 10,000 combinations. A way to calculate this is by Nxwhere N is the number of digits possible (here, 10 different digits arepossible) 0 through 9, and x is the number of places available (here we have 4 places available for a 4 digit number)note the formula is N raised to the x powermeaning, 104or 10 X 10 X 10 X 10 = 10,000 combinationsAnother exampleHow many combinations are available using digits 0-3 for a 2 digit number? The possibilities are: 00 01 02 03 10 11 12 13 20 21 22 23 3031 32 33or 16 possibilitiesthe formula would tells us:Nx is 42 or 4 x 4 = 16* * * * *THE ABOVE ANSWER IS WRONG!Interesting but completely wrong since the answer confuses permutations and combinations. The combination 12 is the same as the combination 21.The number of 4 digit combinations from the numbers 0 to 9 is 10C4 = 10!/[4!*6!]=10*9*8*7/(4*3*2*1) = 210.