Question

show that the sum of four consecutive whole numbers is divisible by 2

Answer 1

3 + 4 + 5 + 6 = 18

18/2 = 9

Answer 2

let the 4 numbers be
x, x+1, x+2, x+3 , where x is an integer.

x + x+1 + x+2 + x+3
= 4x + 6
= 2(x+3)

Any integer multiplied by 2 must be even
or
If any integer has a factor of 2, it must be even by definition.

Answer 3

The gcf(a,b) = 495 and lcm( a,b) =31,185 Find possible values of a and b if a is divisible by 35 and b is divisible by 81.

Answer 4

Kendra,
piggy-backing on other students' questions has two disadvantages:
1. Tutors do not get to see your post (as in the present case)
2. it slows down the other student's getting a response.

Your other post has been answered here:
http://www.jiskha.com/display.cgi?id=1322609635