Question

*For 10th grade*
(Q) Show that any +ve odd integer is the form 6q+1, 6q+3 or 6q+5 where q is some integer.(Please provide an explanation along with the solution so that I can understand....Thank you)

Answer 1

Let a be a given integer.

On dividing a by 6 , we get q as the quotient and r as the remainder such that

a = 6q + r, r = 0,1,2,3,4,5

when r=0

a = 6q,even no

when r=1

a = 6q + 1, odd no

when r=2

a = 6q + 2, even no

when r = 3

a=6q + 3,odd no

when r=4

a=6q + 4,even no

when r=5,

a= 6q + 5 , odd no

.^..Any positive odd integer is of the form 6q+1,6q+3 or 6q+5