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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 31% of 426?

    A. 425.69

    B. 132.06

    C. 13.7

    D. 0.07

    Answer Explanation

    First convert 31% to a decimal before working on the problem

    31%=31/100=0.31

    Thus, 31% of 426=0.31*426=132.06

  • Q #2: The length of a rectangle is 3 units greater than its width. Which expression would correctly represent the perimeter of the rectangle?

    A. 2W+2[W+3]

    B. W+W+3

    C. W[W+3]

    D. 2W+2[3W]

    Answer Explanation

    Let width of the rectangle be W. We are told that length, L is 3 units greater than width. Then,

    L=W+3

    And perimeter of the rectangle is given by the relation, P=2(L+W]=2L+2W

    In place of L substitute W+3. Thus,

    P=2[W+3]+2W

  • Q #3: A consumer makes a $400 down payment on a television that costs $1,570. Which of the following is the number of months it will take to pay off the television with monthly payments of $100? (Assume that no interest is owed)

    A. 12

    B. 16

    C. 15

    D. 11

    Answer Explanation

    Hire purchase cost=down payment + total monthly installment

    Total monthly payment=hire purchase cost-down payment= $(1570-400)=$ 1170

    Number of months=total monthly payment/monthly payment=$1170/$100=11.7 months

    The consumer will clear the balance in 12 months.