Practice Test GeeksCTBS - Comprehensive Test of Basic Skills Practice Test
← All CTBS Flashcard Decks

Mathematics Computation Flashcards

6 cards from real CTBS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Mathematics Computation flashcards as text

  1. An auditorium has 1,250 seats. For a school play, 78% of the seats were sold. How many seats were NOT sold?

    Answer: 275

    First, calculate the number of seats sold by finding 78% of 1,250: 0.78 * 1250 = 975 seats sold. Then, subtract the number of sold seats from the total number of seats to find the seats that were not sold: 1250 - 975 = 275.

  2. A carpenter has a piece of wood that is 10 1/2 feet long. He needs to cut a piece from it that is 3 2/3 feet long. After he cuts the piece, what is the length of the remaining wood?

    Answer: 6 5/6 feet

    To subtract the mixed numbers, first find a common denominator for the fractions, which is 6. Convert 10 1/2 to 10 3/6 and 3 2/3 to 3 4/6. Since 3/6 is smaller than 4/6, you need to borrow from the whole number. 10 3/6 becomes 9 + 1 + 3/6 = 9 9/6. Now subtract: 9 9/6 - 3 4/6 = 6 5/6 feet.

  3. Solve the following expression: 3 + 2 x (6 - 1) ÷ 5

    Answer: 5

    Following the order of operations (PEMDAS/BODMAS): First, solve the parentheses (6 - 1) = 5. The expression becomes 3 + 2 x 5 ÷ 5. Next, perform multiplication and division from left to right: 2 x 5 = 10, then 10 ÷ 5 = 2. The expression is now 3 + 2. Finally, perform the addition: 3 + 2 = 5.

  4. A catering company needs to transport 248 dinner plates to an event. If each box can hold a maximum of 18 plates, what is the minimum number of boxes required to transport all the plates?

    Answer: 14

    To find the number of boxes, divide the total number of plates by the number of plates per box: 248 ÷ 18 = 13 with a remainder of 14. This means 13 boxes will be completely full, but there will be 14 plates left over. A separate box is needed for these remaining plates, so the total number of boxes required is 13 + 1 = 14.

  5. What is the result of 45.81 divided by 0.9?

    Answer: 50.9

    To divide by a decimal, move the decimal point in the divisor (0.9) one place to the right to make it a whole number (9). You must also move the decimal point in the dividend (45.81) one place to the right, making it 458.1. Now, perform the division: 458.1 ÷ 9 = 50.9.

  6. Which of the following fractions is equivalent to 5/8?

    Answer: 25/40

    To find an equivalent fraction, you must multiply both the numerator and the denominator by the same non-zero number. For the correct answer, 5/8 is multiplied by 5/5: (5 × 5) / (8 × 5) = 25/40. The other options do not maintain this equivalency.