Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What has a bottom at the top?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

John was piloting a plane behind a car but was never able to overtake it. Why?

Spot 5 differences in two Christmas tree below:

How many Watermelons are there in the below picture?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

What does this rebus riddle means ?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?