What goes up but never comes down?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Can you count the number of blocks in the picture below?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

I don't get anymore wetter, no matter how much rain falls on me.

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

I have Rs.50 and I spend it in the way as below.