Question 10301
2 4's
2 5's
2 6's


1 digit between the 2 4's:  4_4
2 digits between the 2 5's:  5_ _ 5
3 digits between the 2 6's:  6_ _ _ 6


1) start by putting the 5 between the two 4's"
4_4
454


2) 454 forms 3 numbers. 
It says there are 3 digits between the 2 6's. so I can place the 2 6 around 454:
_454_
6_ _ _ 6
64546


3) it says that there were two digits between the two 5's:
64546 
look at the part that says: 546  4, 6 form two digits, add 5 at the end: 5464


645465 or 564546