Answer
The first place in which the numbers are different is from the hundred position.
Step-by-step explanation
Considering the numbers 23,643 and 23,987, the place value on the numbers are:
Numbers: 23,643 23,987
Ten thousands: 2 2
Thousands: 3 3
Hundreds: 6 9
Tens: 4 8
Unit: 3 7
So comparing the two numbers, we can therefore deduce that the first place in which the numbers are different is from the hundred positions.