What has no start, end, or centre?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

A Club organizes a Running Race, and John, Jacob, Minda, and Tony participated.

The results are as follows

John beats Jacob
Minda beats Toni
Toni beats John

Who came first in the race?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Which Burger Is Different in below image?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

What Deficiency does the below rebus represent?

VIT_MIN

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?