Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What does an Island and the letter T have in common?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Find the last number in the series below:

voN luJ yaM raM ---

What is the longest word in the dictionary?

In the image given, you can find several triangles. Can you count them all?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

What will you call your mother's brother's brother-in-law?