Reema forms 4-digit numbers using the digits 9, 9, 0 and 1 (the digit 9 is used twice, each digit used once). Find the difference between the greatest and the smallest such 4-digit number. (A 4-digit number cannot start with 0.)

Question

Accepted Answer

8811. Greatest: arrange in descending order 9, 9, 1, 0 = 9910. Smallest (no leading 0): smallest non-zero digit 1 first, then 0, 9, 9 = 1099. Difference = 9910 - 1099 = 8811.

Reema forms 4-digit numbers using the digits 9, 9, 0 and 1 (the digit 9 is used twice, each digit used once).
Find the difference between the greatest and the smallest such 4-digit number. (A 4-digit number cannot start with 0.)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 6 Place Value and Large Numbers practice

Reema forms 4-digit numbers using the digits 9, 9, 0 and 1 (the digit 9 is used twice, each digit used once).Find the difference between the greatest and the smallest such 4-digit number. (A 4-digit number cannot start with 0.)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 6 Place Value and Large Numbers practice

Reema forms 4-digit numbers using the digits 9, 9, 0 and 1 (the digit 9 is used twice, each digit used once).
Find the difference between the greatest and the smallest such 4-digit number. (A 4-digit number cannot start with 0.)