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Q: How many even 3-digit positive integers can be written using the digits 1 3 4 5 and6?

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0.12 Or 102 if you do not want to include non integers.

The sum of all the digits of all the positive integers that are less than 100 is 4,950.

279,999,720

Fifty

50%

Three of them.

125

All the numbers from 10 to 99 are positive 2 digit integers

They are 13.

There are none.

52

405

There are 21.

Yes. Integers include both positive and negative numbers (and zero). Anything that, when written in decimal, has no digits after the decimal point.

Every number from 100 to 999 inclusive !

3

20. 16 without repeating a digit.

The sum of the digits is 6.

81

There are 20.

10*9*8=720

First, separate the negative and positive integers (put them into two separate groups). If there is a zero, you can put it in its own group - or put it into the same group with the positive integers. Negative integers come first, then zero, then positive integers.For positive integers:An integer with less digits comes before an integer with more digits.For integers with the same number of digits, look at the first digit. The integer with the smaller digit in this position comes first.If the first digit is the same, look at the second digit. If those are equal, look at the third digit, etc.For negative integers, it is the other way round - for example, an integer with MORE digits comes first.

There is only 1, the number 54.

There are 870 such numbers.

Integers of 6 digits are normally greater than integers of 5 digits