John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

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

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Can you make four (4) nines (9) equal 100?

I add 5 to 9 and get 2. The answer is correct, so what am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?