Name a key which is hardest to turn.

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

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

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Which digit occurred maximum times between the number 1 and 1000?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

Replace the question mark in the picture below.

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?