Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

Why do people go to bed?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

What can jump higher than a building?

Which five letter word can be added at the end of below word to form a
valid word?

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

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?