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Q: What is the ones digit of 5 less than hundreds digit and the other digits are all twice the ones digit?

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22621, 44742, 66863, 88984

804

2,241 because you double the digits

452, 894. None other that I can think of

9218 9425

50

None. The sum of one digit can't be twice the size of the digit.

216.

This is missing some information. You mentioned the tens digit twice and didn't mention the ten thousands digit. One possibility is 87184.

216

42.21 or 84.42

84.42 or 42.21

It is 99,887,765

The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.

I'm greater than one million but less than ten million im an even number none of my digits are less than three no digit is used more than once the sum of the digits in the ones period is twelve the digit in the ten thousands place is equal to the sum of the digits in the tens an hundreds places the digit in the millions place is two more than the digit in the thousands place the digit in the hundred thousands place is twice the digit in the tens place what is the mystery number?

For this type of problems, you basically assign digits from left to right, choosing the largest digit, in every case, that satisfies the requirements.

1.382 OR 0.000 or 2831

(a)(a-2)(a+2)(2a) It can be: 2044 3156 4268

18 is the only number that matches these criteria.

24.

17

Excluding numbers which begin with 0, there are 67,200 of them.

2.3

I am a four digit number. My tens digit is 2 more than my ones digit. My hundreds and thousands digit are both 1 less than my ones digit. What number can i be?

If the number is odd, the last digit is odd. That means the ten's digit must be twice the one's digit. There are only four two-digit numbers where the ten's digit is twice the one's digit: 21, 42, 63, 84. Check which of these satisfy all the clues.