Question

Write seven digits largest and smallest numbers using digits in the above given balloons only once.

Answer 1

Answer:

Let the 9 is greatest decimal digit, the greatest 7− digit number would begin with as many nines as possible.

Since there must be 3 different digits in the 7− digits number,

Let begin with five nines and fill the last two places with 8 and 7.

The smallest seven digit number is 1000000

But we need three different digits it will be 1000002

Now,

Let find their sum =9999987+1000002=10999989.