Lights on 4th and 5th Grade Math

My tens digit is one more than my hundreds digit. My hundreds digit is an even number between 5 and 7. My ones digit is the number of vertices on a triangle. What am I?

I'm an even number. I'm >758 and <893. I'm a multiple of 100. What am I?

The sum of my digits is 20. My ones digit is 4X2. My hundreds digit is one less than my tens digit. My thousands digit is five less than my ones digit. What am I?

All of my digits are even numbers. I'm between 2999 and 2799. The sum of my tens digit and ones digit is 6. My tens digit is not 0, 4, or 6. What am I?

My hundreds digit and tens digit are both the same number. My thousands digit is three less than my ones digit. The sum of my digit s is 31. The sum of my hundreds and tens digits is 18. What am I?

I'm > 6000 and < 6500. My thousands digit and ones digit are the same. My tens digit is two more than my ones digit. My hundreds digit is the only whole number that's less than one. What am I?