Arithmetic Reasoning

If Connie deposits $400 into a savings account with a 4% annual interest rate and doesn't withdraw any of the money for 3 years, what will her balance be at the end of 3 years?

$449.95 (Here's a yearly breakdown remembering that 4% interest is (4/100) = 0.04 as a decimal: Year 1: $400.000 x 0.04 = $16.000 interest and $416.000 total Year 2: $416.000 x 0.04 = $16.640 interest and $432.640 total Year 3: $432.640 x 0.04 = $17.306 interest and $449.946 total Which, when rounded to two decimal places, is $449.95)

A menswear store is having a sale. Buy one dress shirt at full price and get both shirts for 10% off. If Sam buys two shirts, each with a regular price of $40.06, how much money will he save?

$8.02 (40.06 x (10 / 100) = $40.06 x 0.10 = $4.01 Sam bought two shirts so the total savings is 2 x $4.01 = $8.02.)

If a rectangle is twice as long as it is wide and has a perimeter of 48 inches, what is the area of the rectangle?

128 {2w + 2h = 48 w + h = 48 / 2 w + h = 24 w = 24 - h From the question we know that h = 2w so substituting 2w for h gives us: w = 24 - 2w 3w = 24 w = 24 / 3 w = 8 Since h = 2w that makes h = 16 and the area 8 x 16 = 128}

If all of a roofing company's 9 workers are required to staff 3 roofing crews, how many workers need to be added during the busy season so they can send 8 complete crews out on jobs?

15 (9÷3=39÷3=3.....8 x 3 = 24 ....24 - 9 = 15 )

What's the average of all the multiples of 4 from 4 to 12?

8

- 3√3, −13−13, 0, 1, 7474, 9.7, ... are:

Real Numbers