Question 463105
I am a number greater than 50,000 but less than 70,000. My ones digit and tens digit are the same.  My ten thousands digit is three times the sum of my ones digit and tens digit.  Both my thousands digit and hundreds digit are half my ten thousands digit.  What number am I?

Let x = ones digit
    x = tens digit
3(x+x) = 6x = ten thousands digit
6x/2 = 3x = thousands digit
3x = hundreds digit

The ten thousand digit should be divisible by 2 and should be between 5 & 7. So, the ten thousands digit is 6.
6/6 = 1 = ones digit = tens digit
3(1) = 3 = thousands digit = hundreds digit

The number is 63,311.