Math Riddles
John father is 3 times his age. His brother Mark, is 2 years older than John. If John dad is 33 years old, how old is Mark.
Mark is 13 years old
Solve:
2 x3 + 20 - 4
22
Find a:
a + 2= 22
a = 10
Mom and dad have four daughters, and each daughter has one brother. How many people are in the family?
7
because the daughters share the same brother
Solve:
52 - 22 - 5 + 2
18
A chocolate bar costs A cents and a drink costs B cents. Write down an expression for the total cost of 3 bars chocolate bars and 2 drinks.
3A + 2B
Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation.
Answer: 2+5= 3+4
Because 2 +3+4+ 5= 14 and half of 14 is 7. Therefore, you are going to need 7 on both side of the equal sign.
Solve:
(5/25)/(3/15)
1
Simplify the following:
4m2+5+2m + 20 m −1 -2 -3.
4m2+22m -1
Add this number with any other number and you will always get the same answer. What’s the number?
0
Examples
50+0=50
5+0 = 5
Solve
22 / 2 + (2)
4
Brian is a window cleaner. He uses the following formula to calculate the amount to charge his customers:
Charge =$50+4n + 3n2
Where n is the number of windows a house has.
If a house has 6 windows, how much would Brian charge?
50 + 24 + 3(36)= 182
3010
The formula for changing degrees Celsius (C) to degrees Fahrenheit(F) is:
F =( 9C / 5) + 32
Find C
C= ( 5(F -32) )/9