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How many numbers can be formed using the digits 01234?
If you use all of them each time, then 5*4*3*2*1 = 120. Of these, 24 will have a leading 0. There are 325 different numbers of 1-5 digits although, again, some of them begin with 0. These are the same as shorter numbers without the zero: that is, 023 has the same value as 23.
What is the sum of the different numbers that have the same absolute value?
If 2 numbers are different, but have the same absolute value, then one is the opposite of the other. Any number plus its opposite equals zero.
How many significant figures does the number 1000.00 contain?
1000.00 has four significant digits. Basically the total amount of significant digits will be the amount of numbers it needs to retain the same value. I.e. 126.26 has 5 significant digits, because you need all 5 to make the same value. 120.00 has three significant digits, because .00 if removed would not change the value of the number.
Two numbers that have the same absolute value but different signs?
If you are talking about same numbers but different signs then there are a lot. such a l-4l = l4l because they are the same amount of space to the zero.
2 numbers that have the same absolute value but different signs?
It is impossible. The absolute value is always positive.
