Question

Now make the greatest and smallest 4digit number by using any one digit twice

Answer 1

GREATEST NUMBER -

9987

IF WE CAN REPEAT ONE NUMBER TWICE, THEN TAKE THE GREATEST NUMBER REPEAT IT TWICE AND CONTINUE ON WITH THE NUMBERS AFTER IN DESCENDING ORDER

SMALLEST NUMBER -

1002

AS WE CAN REPEAT A NUMBER TWICE, THEN THE SMALLEST NUMBER WILL BE REPEATED. BUT IF WE WRITE 0012, THEN IT WOULD BE A TWO DIGIT NUMBER. SO, WRITE THE GREATEST NUMBER AFTER 0 FIRST. THEN, WRITE THE TWO 0'S AND CONTINUE IN ASCENDING ORDER

HOPE THIS HELPED YOU