What is the least common denominator for the fractions below? (Round the answer to the nearest integer) 1/2, 2/3, 4/5
A. 30
B. 25
C. 7
D. 19
We determine least common denominator (LCD) using prime factorization of denominators as follows
2=1*2
3=1*3
5=1*5
Thus, LCD of 2, 3, 5 = 2*3*5=30
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Math
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Q #1: (x/y)-z=rw Solve for x in the equation above.
A. X=y(z+rw)
B. X=rw(y-z)
C. X=rwy+z
D. X=rwy-z
Answer Explanation
Given the equation (x/y)-z=rw, we make x the subject of the formula as follows:
(x/y)-z=rw
Add z to both sides of the equation
(x/y)-z+z=rw+z
(x/y)=rw+z
Multiply both sides by y
(x/y)*y=y(rw+z)
X=y(rw+z)
Rearranging the equation results in:
X = y(z+rw)
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Q #2: Four friends are sharing a pizza. One friend eats half of the pizza. The other three friends equally divide the rest among themselves. What portion of the pizza did each of the other three friends receive?
A. 1/5
B. 1/3
C. ¼
D. 1/6
Answer Explanation
We assume the pizza to be full representing 1. One friend eats ½ of 1=1/2
The remaining portion of the pizza=1-1/2=2/2-1/2=1/2
Three friends share equally ½ of the pizza=1/2÷3=12*13=1/6
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Q #3: There are 800 students enrolled in four allied health programs at a local community college. The percentage of students in each program is displayed in the pie chart. Which of the following is the number of students enrolled in the respiratory care program?
A. 336
B. 152
C. 144
D. 168
Answer Explanation
100% represents total students four allied health program. Thus, 100%=800 students, and 19% joins respiratory care program is
Thus, 152 students joined the respiratory care program.
