What condition must be met for a number to be divisible by 10?

For a number to be divisible by 10, it is essential that the number ends in 0. This is a fundamental rule of divisibility, which states that any integers that conclude with the digit 0 can be evenly divided by 10 without leaving a remainder.

To elaborate, when a number's last digit is 0, it indicates that it can be expressed as a multiple of 10, which is a necessary condition for divisibility. Therefore, any other digit or condition, such as being even or having a particular first digit or specific sum of digits, does not affect its ability to be divided by 10. This makes the criteria of ending in 0 the direct and only requirement related to divisibility by 10.