What is the fastest way to double your money?

Can you name an animal whose killing cannot be performed without spilling your own blood?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

what's the probability of getting a king or a queen from a pack of 52 cards?

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

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

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?