Let the gradient of a line be 3, find the equation of the line at point(1,2)

Class 6 algebra

Question. The ground floor has 4 rooms more than the first floor . The second floor has 6 rooms less than the ground floor . If the first floor has 6 rooms , how many rooms do the ground floor and the second floor have

1. How many of numbers in contain a 3 and a 6?

2. How many of numbers in contain neither a 3 nor a 6

Perimeter defination