The number of my hundreds plus the number of y thousands is 3.the number of my tens is 7 times the number of my hundreds.the number of my ones in 3 times the number of my thousands.all my digits are different.What number am i?

To solve this problem, let's break down the information given and find a solution step by step:

1. "The number of my hundreds plus the number of y thousands is 3."
Let's denote the number of hundreds as "x". Since the number of y thousands is given, we can write the equation as: x + y = 3.

2. "The number of my tens is 7 times the number of my hundreds."
Let's denote the number of tens as "t". We can write the equation as: t = 7x.

3. "The number of my ones is 3 times the number of my thousands."
Let's denote the number of ones as "o". We can write the equation as: o = 3y.

4. "All my digits are different."
This means that each digit (x, y, t, and o) must be unique and not repeated.

Now, let's find the solution by systematically substituting and solving for the variables:

From the equation t = 7x, we know that t must be a multiple of 7. Since each digit must be unique, t can be either 7, 14, 21, 28, 35, 42, 49, 56, or 63.

From the equation o = 3y, we know that o must be a multiple of 3. Again, considering unique digits, o can be either 3, 6, or 9.

Using the information from the equation x + y = 3, we can find the possible combinations for x and y:
- If x = 1 and y = 2, we have two unique digits but cannot satisfy the conditions for t and o.
- If x = 2 and y = 1, we have two unique digits but cannot satisfy the conditions for t and o.
- If x = 3 and y = 0, we have three unique digits but again cannot satisfy the conditions for t and o.

With the given information, it seems impossible to find a solution that satisfies all the conditions. However, if there are any additional constraints or information, please provide it, and we can reassess the problem.