Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

What is the riddle which can be asked all day with a different correct answer each time.

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

How can you make number one disappear by adding something to it?

Can you identify the hidden rebus in the image below?

What is at the end of a rainbow?

If 1+9+8=1, what is 2+8+9?

How many times can you subtract the number two from the number fifty?

Can you divide the below-given shape into four equal and identical pieces?