Question

With digits $5$ and $6$ make all possible $4$-digit numbers using each digit twice$.$ Also write the greatest and the smallest numbers from them$.$

Answer 1

We want to make four digit numbers using $5$ and $6$ each digit is repeated twice$.$

Possible numbers are $:$

$5566,5656,6655,6565,5665,6556$

For the greatest number place $6$ at the highest place value and then $6$ and $5$ and in units place $5.$

Therefore$,$ the largest four digit number is $6655$ using $5$ and $6$ each digit is repeated twice

For the smallest number place $5$ at the higest place value and then $5$ and $6$ and in units place $6.$

Therefore$,$ the smallest four digit number is $5566$ using $5$ and $6$ each digit is repeated twice

Hence, the largest and the smallest numbers are $6655$ and $5566$ respectively$.$