Two hours ago it was as long after one o'clock in the afternoon as it was before one o'clock in the morning. What time is it now?

Answer:

It would be 9:00 pm. There are 12 hours between 1:00 pm and 1:00 am and half of that is six hours. Half-way between would be 7 o'clock. Two hours later it would be 9:00 o'clock.

A frog fell into a well 12 feet deep. He could jump 3 feet, but every time he jumped 3 feet, he fell back 2 feet. How many times did he have to jump to get out of the well?

Answer:

The tenth jump took him out. (On the tenth jump he reached 13 feet and was out.)

One is to three as three is to five and five is to four and four is the magic number.

What is the pattern?

Answer:

One has three letters in the word three has five letters in it five has four letters and four has four letters in it (if you try more numbers they will always come back to the number four: so four is the magic number)