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 is the fastest way to double your money?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Take away the whole and some still remain. What is it?

Complete the table series riddle by finding the number that can replace "??".

There was an aeroplane crash, every single person died, but two people survived. How is this possible?