Write all three digit numbers using the digits `2,3,5` taking each digit only once

Write all 3 -digit numbers using the digit 2,3,5, taking each digit only once.

Write all 3-digit numbers using the digits 1, 3, 5 taking each digit only once.

Write all 3-digit numbers using 2, 3, 4 taking each digit only once.

The number of 3 digit numbers formed by using digits 3, 5, 9, taking each digit exactly once, is 3 (b) 4 (c) 5 (c) 6

Write the greatest and the smallest numbers of 4 digits that can be formed using the digits 0, 8, 7, 5; using each digit only once.

The largest 4-digit number formed by the digits 6, 7, 0, 9 using each digit only once is 9760.

Find the sum of the greatest and the least six digit numbers formed by the digits 2, 0, 4, 7, 6, 5 using each digit only once.

Write all the possible three-digit numbers using the digits 5, 0 and 7 without repetition of the digits.