Question

using the digit 4,3,6, and 6 add the largest and smallest 4 digit number whitout repeating any digit?

Answer 1

(i) 7 is at unit’s place

The smallest 4-digit number using the digits 5, 4, 7 and 9, and keeping 7 at unit’s place = 4597

The greatest 4-digit number using the digits 5, 4, 7 and 9 and keeping 7 at unit’s place = 9547