I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

You can hear me, but you can't touch or see me.

What am I?

It is always ahead of me yet I can never see it. What is it?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Why do we preferably have round manhole covers and not square ones?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What jumps when it walks and sits when it stands?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?