Allowance

When Will was 5 years old, his allowance was 25 cents. When he was 6, his allowance was 50 cents. When he was 7, his allowance was $1.00. If Will's allowance continued in this pattern, what will his allowance be at age 11?

How tall?

George's dad is 6'0" tall and his mother is 5'4" tall. One formula used to predict a child's adult height is to take the average of the height of the parent of the opposite gender and 13/12 the height of the parent of the same gender. Using this formula, what is George's expected adult height, in inches?

Prices each Month

In a boutique, items were put in a showcase, and each was assigned a price for January. Each month after that, the price was 10 percent less than the price for the previous month. What is the ratio of the price of an item in April to the price of the same item in January? Express your answer as a common fraction.

What is the number?

If twice the number is equal to 6 more than half the number, what is the number?

Statistics

Felix's test scores for the second quarter are 87, 92, 88, 90, 83, 90, 86. What is the mean (average) of the median (middle number) and the mode (most frequent) of these scores.

Mean, Median, and Mode are terms you should get familiar with! :)

Prime Factors

What is the product of the largest and smallest prime factors of 165?

Changing Rectangle

The length of a rectangle is three times the width. A new rectangle is created by decreasing the length of the original rectangle by half. By what factor must the original width be multiplied, if the area remains unchanged?

9 diagonals

If a regular polygon has a total of nine diagonals, how many sides does it have?

@ operation

An operation @ is defined as a @ b = a + b/2 . What is the value of −8 @ 6?