Prove that twice of ten is the same as twice of eleven.

In the four images below, can you find the odd one out?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

What is the next number in this series?

4,12,84,3612....

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?

The cream is heavier than Milk. True or False?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

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?

How can you make number one disappear by adding something to it?