WI Forward - Wisconsin Forward Mathematics: Numbers and Operations Questions and Answers 3

Question 1

What is the LCM of 6 and 8?

Accepted Answer

24

Answer

Multiples of 6: 6,12,18,24... Multiples of 8: 8,16,24... LCM = 24.

Question 2

Which number is irrational?

Accepted Answer

pi

Answer

Pi cannot be expressed as a fraction and its decimal never terminates or repeats.

Question 3

A $60 shirt is 25% off with 7% tax. What is the final price?

Accepted Answer

$48.15

Answer

Sale: $60 x 0.75 = $45. Tax: $45 x 0.07 = $3.15. Final: $48.15.

Question 4

What is 5! (5 factorial)?

Accepted Answer

120

Answer

5! = 5 x 4 x 3 x 2 x 1 = 120.

Question 5

In 8 + 2 x (6 - 3)², which operation comes first?

Accepted Answer

(6 - 3)

Answer

PEMDAS: parentheses first, so (6-3) = 3.

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