Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Forwards I am heavy, backward I am not. What am I?

You need to move three matchsticks to form three squares. Can you do it?

I have feet, but no legs. Which animal Am I?