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Greatest six digit even number no digit used more than once?
Use the largest available digit possible starting with the hundred thousands digit, making the ones digit the largest even digit {0, 2, 4, 6, 8} that has not been used. The required number is: 987654
What is the greatest 8 digit even number using prime digits?
To be an even number then the final digit = 2. The largest single prime digit is 7 (as both 8 and 9 are composite). The greatest even number fulfilling the conditions is 77777772.
If you add a two digit number to a two digit number do you get a four digit number?
No. When adding the smallest 2 digit number (= 10) to the smallest 2 digit number (again, 10) the result is a 2 digit number (10 + 10 = 20). When adding the largest 2 digit number (= 99) to the largest 2 digit number (again, 99) the result is a 3 digit number (99 + 99 = 198). As you can see, you'll either get a 2 or 3 digit number, but never a 4 digit number.
What is the greatest 2 digit even number?
The greatest 2-digit even number is 98
What is the largest 4 digit even number that has the digits 1 2 3 4 used only once?
4312
