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Earn +20 ptsQ: How many ways can you combine 2 digits?
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Given the digits 0-9... how many ways can you form an even number without replacement of numbers?
one digit: 5 ways two digits: 5 * 9 ways three digits: 5 * 9 * 8 ways four digits: 5 * 9 * 8 * 7 ways ... ten digits: 5 * 9! ways So if you have to use ten digits, then the answer is 5 * 9! = 1814400. If you can use anywhere from one to ten digits, then the answer is: 5 * (9! + 8! + 7! + 6! + 5! + 4! + 3! + 2! + 1) = 2045565
The last four digits of Juan's phone number are 2138 In how many different ways can Juan rearrange these digits?
24. =4*3*2*1
How many different ways can you get the largest sum adding 2 digit numbers if none of the digits can repeat?
none
What is 12x22?
12 multiplied by 22 is equal to 264. This can be calculated by multiplying the tens digits (1 and 2) to get 2, and then multiplying the ones digits (2 and 2) to get 4. Finally, combine these results to get the answer 264.
How many digits are in 2 billion?
10 digits
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