Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

I am quite hot but become too cold if you remove the first two letters. What am I?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

Count the squares in the matchstick puzzle below?

What always comes into a house through the keyhole?

Readers with high attention to detail can spot the cheater in the exam hall in 5 seconds. Are you one of them? Test your visual skills now!

Can you find the missing piece of the Porsche?

Can you find out the remainder when 3^300 is divided by 5?