ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

10+10 and 11+11 can give you the same answer.

Explain how?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

what does the below math rebus puzzle mean?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?