Which of the following questions are open-ended questions and can be used to enhance mathematical thinking?
1
Find the solution of 2x + 4 = 8
2
Write a real world problem for which 2x + 4 = 8 is a solution
3
Verify that x = 2 is the solution of the equation 2x + 4 = 8
4
Plot the graph of 2x + 4 = 8 on cartesian plane