VTMO 2026 - Grade 5 - Final - SET 3 - Self-study Question 1

A palindrome reads the same from left to right as from right to left. For example, 1111, 1221 and 12321 are palindromes. How many four-digit palindromes can be formed using the digits 3, 5, 7 and 0? Digits may be used more than once.