Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

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?

A bank customer had $100 in his account. He then made 6 withdrawals. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
----- -----
$100 $99

Why are the Totals not tallying?

Can you identify the hidden rebus in the image below?

Count the number of triangles in the picture below:

You need to cut a round cake into eight equal pieces with just 3 cuts. Can you do it?

What does Alexander the Great and Winnie the Pooh have in common?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Why is Saturday stronger than Monday?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?