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Q: What 3-3 digit numbers can you subtract by 1000 in order to get your final answer as 321?

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They mean that if you subtract one of the two digit numbers from another then that is the difference. The numbers in the question are usually smallest first so you can't subtract like that. In these questions you may change the order of the numbers.

Write them as decimals, and compare. If the first digit of two numbers is equal, compare the second digit; if the second digit is equal, compare the third digit, etc.

5

36 of them.

There are ten digits 0-9 that you can choose from. 10P4 = is the number of ways to order these ten digits into four digit numbers.However, 0 cannot begin the number or else it is a 3 digit number (0341 is a three digit number). So, we must subtract from 5040 the number of 3 digit numbers which do not contain 0. There are 1-9 digits to choose from. 9P3 = 504 is the number of ways to order these nine digits into three digit numbers.5040 - 504 = 4536______________________________________________Another way to arrive at the same result:You have 9 choices for the first number (1,2,3,...,9). Once you choose the first number you have 9 numbers to choose from for each of the remaining three numbers: (0,1,2,3,...9) but excluding the number you chose for the first number. So you have (9P3) ways to choose the final three digits.Thus, you have a total of 9*(9P3) ways to form your four digit number:9*(9P3)=9*9*8*7=4536

this question is not soluble.the information given reduces the no. of candidates from 9999 to 900 but cant get closer than that

If you mean 3-digit numbers whose digits are in decreasing order, then the answer is 20.

There are several ways: convert them all into decimal (or percentage) notation and order these. Or subtract the rational numbers in pairs. If the answer is positive then the first of the two is larger.

Actually, you don't need JNZ. You simply subtract the low order halves, and then you subtract with borrow the high order halves. You can carry this to any arbitrary precision.

With the exception of the number zero, the number 236719458 contains all the English names of the single-digit numbers in reverse alphabetical order.

Well, the simplest way to do this is to break the page numbers down into groups. Numbers 1-9 have 1 digit. Numbers 10-99 have 2. Numbers 100-246 have 3. Thus we have 9 one-digit numbers, 90 two-digit numbers, and 147 three-digit numbers. Therefore: (9)(1) + (90)(2) + (147)(3) = 630 digits.

There is only one combination since the order of the numbers in a combination does not matter.

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