OAA Mathematics 4

Question 1

What is the least common multiple (LCM) of 6 and 8?

Accepted Answer

24

Answer

The multiples of 6 are 6, 12, 18, 24 and of 8 are 8, 16, 24; the LCM is 24.

Question 2

A scale drawing uses 1 inch to represent 50 miles. If a road is 3.5 inches long on the drawing, how long is the actual road?

Accepted Answer

175 miles

Answer

3.5 × 50 = 175 miles.

Question 3

Which of the following is NOT a property of a parallelogram?

Accepted Answer

All angles are right angles

Answer

A parallelogram does not require right angles; that is a property of a rectangle.

Question 4

If y = 3x + 2, what is y when x = –4?

Accepted Answer

–10

Answer

y = 3(–4) + 2 = –12 + 2 = –10.

Question 5

A data set has a mean of 50 and 8 values. One value of 90 is added. What is the new mean?

Accepted Answer

54.4

Answer

Original sum = 50 × 8 = 400; new sum = 400 + 90 = 490; new mean = 490 ÷ 9 ≈ 54.4.

(OAA) Ohio Achievement Assessment Practice Test