1. Tardigrade
  2. Question
  3. Mathematics
  4. The number of natural numbers less than 7,000 which can be formed by using the digits 0,1,3,7,9 (repitition of digits allowed) is equal to :

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The number of natural numbers less than $7,000$ which can be formed by using the digits $0,1,3,7,9$ (repitition of digits allowed) is equal to :

JEE MainJEE Main 2019Permutations and Combinations

Solution:

Number of numbers = $2 \times 5^3$
Required number = $5^3 + 2 \times 5^3 - 1$
= 374

Solution Image