Metashkola Olimpiada Po Matematike Zadaniia Official

A three-digit number is divisible by 9. If you swap the first and last digits, the new number is also divisible by 9. How many such numbers exist where the middle digit is 5? Part 3: Geometry & Spatial Thinking (15 points each)

Focus on topics like combinatorics , Dirichlet's principle , and geometric transformations . metashkola olimpiada po matematike zadaniia

Find the smallest natural number whose digits sum to 25 and which consists only of different digits. Sequence Logic: Look at the sequence: A three-digit number is divisible by 9