Question

Which digits can replace the square to make a true statement 6,456 <6■12 <6788 5,6 or 4,5,6 or 5,6,7 or 4,5,6,7

Answer 1

The answer is 5, 6, 7

Because

6456 < 6512 < 6788
6456 < 6612 < 6788
6456 < 6712 < 6788