Following are four questions posed by a mathematics teacher. Which of the following is an open-ended question?
1
If sum of two numbers is 15 and one of them is 7, what will be the other number?
2
If the age of Anil is 7 years and his father's age is 5 times more than that of Anil's age. What will be the age of father?
3
If sum of two numbers is 17 , then what are the numbers?
4
What should be added to 17 to get 23 ?