An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

Why is it against the law for a man living in Delhi to be buried in Mumbai?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

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

? : 3839 :: 11 : 1209

People make me, save me, change me, raise me. What am I?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

What does this mathematical rebus means ?

What has lots of eyes, but can’t see?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?