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The Best Place for Fun - Math Riddles Page 1.

Place addition signs between some of the numbers below in such a way that the sum equals 99.  There are 2 solutions.

Answer


Examine the following:

1 + 23 - 4 + 5 - 6 + 78 + 9 = 106

Notice that the digits 1 through 9 are used in order to arrive at 106. Using 1 through 9 in order, and using only addition or subtraction, create an equation that equals 100.  The are many solutions.

Answer


Can you determine what the next row of numbers should be?

 1
11
21
1211
111221
312211
13112221

Answer


Paul boasted to his friends that he had done 20 percent better on his math test than Pete did.  Pete got an 80 on his test; so Paul's friends all believed that Paul got a 100.  Were Paul's friends correct?

Answer


A Corvette is traveling at 30 miles an hour on a head-on collision course with a Volvo.  The Volvo is traveling at 20 miles per hour.  When the two cars are exactly 50 miles apart, a very fast fly leaves the front fender of the Corvette and flies towards the Volvo at 100 miles an hour.  When it reaches the front fender of the Volvo it instantly reverses direction and flies back to the Corvette.  The fly continues flying back and forth between the approaching cars.  At the moment the two cars collide, what is the total distance the fly has traveled?

Answer


Mary is 54 years old, and her mother is 80. How many years ago was her mother three times the age of her daughter Mary?

Answer


Pete weighs half as much as Paul, and Pat weighs three times as much as Pete.  Together, they weigh 720 pounds.  How much does each man weigh?

Answer


If

2 + 3 = 10
7 + 2 = 63
6 = 5 = 66
8 + 4 = 96
then
9 + 7 = ?

Answer


Using only addition, can you reach the sum of 100 using some, or all of the numbers listed below as many times as you want?

16, 17, 23, 24, 39, 40

Answer

 

 

 

 

 

 

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