1.

Answer it correctly? ​

Answer»

stion.

Some students are standing in a circle. They are at equal distance from each other.

If the 9th student is standing exactly OPPOSITE the 22nd student how MANY students are forming the circle?

Answer Keys.

We need to know how many students are in a semi-circle.

Then we can find the TOTAL number of students.

Solution.

From the 9th to the 22nd student, INCLUDING ONE from both[1], there are total 13 students in the semi-circle.

So, there are 26 students who are forming a circle.

Information.

[1] To avoid counting the same person more than once, we must count one person at the end and exclude the other.

Now, flip the circle and connect it. There's no person in common! We can safely say that there are 26 students.


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