
What is the missing number?
7926Add the left and right numbers and then subtract the top and bottom numbers to get the center number.

There are a number of books on a bookshelf. If one book is the fourth from the left and sixth from the right, how many books are on the shelf?
891012 
How many rectangles are in this image?
1412810 
What number do you get when you multiply all of the numbers on a telephone's number pad?
362,88045725,760Any number multiplied by zero is zero.

Which number comes next in this sequence?
3456The sequence corresponds to the number of letters in the numbers 111.

Mary has six daughters, and each of her daughters has a brother. How many children does Mary have?
791222Each daughter shares a common brother.

Two men catch two fish in two minutes. At this rate, how many men would it take to catch 500 fish in 500 minutes?
210250500One man catches one fish in two minutes. Therefore, one man could catch 250 fish in 500 minutes. Thus, two men could catch 500 fish in 500 minutes.

How many triangles are in this image?
14366482 
Finish this number series:
1224212211131221142212311422121311123422Read the numbers out loud. In the number 13211422, for example, there are one 1, one 3, one 2, two 1's, one 4, and two 2's, thus 111312211422 is the subsequent number.