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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

Answer Explanation:

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

  • Q #1: Which of the following is the correct simplification of the expression below? 12 ÷ 3 * 4 - 1 + 23

    A. 6

    B. 21

    C. 38

    D. 23

    Answer Explanation

    Use the order of operations to solve the given equation. The acronym PEDMAS will help us to solve the given problem.

    P- Parenthesis

    E-Exponents

    D-Divide

    M-Multiply

    A-Add

    S-Subtract

    From the given equation start with solving :-

    12 ÷3 * 4 - 1 + 23

    Next, carry out division 12÷3=4

    4*4-1+23

    Multiply is 4*4=16

    16-1+23

    Add or subtract can be conducted in any order. From left to right, we subtract followed by addition

    Subtract 16-1=15

    15+23

    The last step is to add 15+23

    15+23=38

    Thus, the answer to the given equation is 38.

  • Q #2: 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

    Answer Explanation

    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

  • Q #3: Two friends get frozen yoghurt. The ratio of yoghurt to toppings is 4:3. If one of the friends has 4.5 oz of toppings in their bowl, which of the following is the amount of yoghurt in their desert?

    A. 6 oz

    B. 5.5 oz

    C. 3 oz

    D. 3.5 oz

    Answer Explanation

    Yoghurt: toppings=4:3

    Yoghurt: 4.5 oz =4:3

    We convert the given ratio into a proportion equation as below

    Multiply both sides by 4.5 oz