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

O T T F F S S ?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

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

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

What came first, the chicken or the egg?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

I don't get anymore wetter, no matter how much rain falls on me.

Why is a river so rich ?