Question

The number of pieces of plywood, each 0.45 cm thick, required to make a pile 1.89m high are __ .

Answer 1

Step-by-step explanation:

let us start with taking s where a is positive odd integers we apply the division algorithm with a and b = 4

since 0 <_ r < the possible remainder are 0 ,1,2 and 3

this can be 4q or 4q +1 or 4q +2 or 4q +3

where q is the quotient how ever , since odd a cannot be 4q or 4q + 2

any odd integers is form of 4q + 1 or 4 q + 3