Why did the Girl throw the butter out of the window?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Can you count the number of triangles in the picture below?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

How many words can a pen with half refill write?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

81 x 9 = 801. What must you do to make the this equation true?

Name a key which is hardest to turn.