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!

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What does an Island and the letter T have in common?

When we see 2 but call 10?

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?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?