June 2021
Problem of the Month

Big Number Problem

Consider the number 1234567891011...484950.

(1) How many digits are in the number?

(2) Without rearrangement of digits, what is the smallest number possible if 75 digits are removed?
    You can not have a leading zero.

(3) Without rearrangement of digits, what is the largest number possible if 75 digits are removed?

Solution to the Problem:

(1) 91 digits

(2) 1,000,012,344,444,440

(3) 9,999,454,647,484,950

The 91 digits are:
1234567891011121314151617181920
212223242526272829303132333435
363738394041424344454647484950

Correctly solved by:

1. Veena Mg	Bangalore, Karnataka, India
2. Hari Kishan	Meerut, Uttar Pradesh, India
3. Colin (Yowie) Bowey	Beechworth, Victoria, Australia
4. K M Thomas and Ivy Joseph	Pune, Maharashtra, India
5. Kelly Stubblefield	Mobile, Alabama
6. Brooke German	Marshall, Wisconsin

Send any comments or questions to: David Pleacher