I know a nine-letter word having only one vowel.
Do you ?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

I look at you, you look at me I raise my right, you raise your left. What am I?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.