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 happened when the wheel was invented?

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?

What begins with T, ends with T, and has T in it?

Take one out and scratch my head, I am now black but once was red. What am I?

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

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

Identify the 10 differences between the two given pictures.