Tough and Tricky questions: Number Properties.
If (z + 3)/7 is an integer, what is remainder when z is divided by 7? Choose the correct choice from the following answers:
A) 2
B) 3
C) 4
D) 5
E) 6
Assume the answer choices as the value of z   7/7= 
<gadget id="calculator">7/7</gadget>
<output>1</output>
1   Ans 5
<result>D</result>
Tough and Tricky questions: Number Properties.
If (z + 3)/7 is an integer, what is remainder when z is divided by 7?