The number of numbers lying between 10 and 1000 that can be formed with 0, 2, 3, 4, 5, 6 so that no digit being repeated in any number is

Two digits number (0 can't come on unit place)

$5\times 5=25$

Three digits number

$5\times 5\times 4=100$

Hence total number of numbers between 10 and 1000 that can be formed using given digits is $=125$