What number comes next in the series?

5 15 5 18 5 24 14 20 _

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

What is next number in the pattern below:

131 517 192 123 ?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

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

What does this rebus mean?

O
N
C
E
TIME

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

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?