0000:00:00:00:00Start9Number 9ExplanationIn a housing cluster, every house has a number consisting of two digits. The digits used are whole numbers less than 101010. Then the number of possible house numbers where all digits are odd is ....101010252525303030353535505050
9Number 9ExplanationIn a housing cluster, every house has a number consisting of two digits. The digits used are whole numbers less than 101010. Then the number of possible house numbers where all digits are odd is ....101010252525303030353535505050
