How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Find the next number in the sequence

5 12 24 36 ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

What is full of holes but still holds water?