The number of two-digit numbers in which the tens digit and the units digit are different and both odd is

Name: The number of two-digit numbers in which the tens digit and the units digit are different and both odd is
Uploaded: 2026-08-12T11:26:36.593152+05:30
Duration: 54 s
Description: The number of two-digit numbers in which the tens digit and the units digit are different and both odd is

Correct Answer: 20

Solution

The units digit can be any of the $$5$$ odd digits $$1,3,5,7,9$$. After choosing it, the tens digit can be any of the remaining $$4$$ odd digits. Hence the total number is $$5\times4=20$$.