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Mathematics Flashcards

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

Read the first 11 Mathematics flashcards as text

  1. What is the value of 5 × 7 − 3?

    Answer: 34

    Explanation: First, multiply 5 and 7 to get 35. Then, subtract 3 to get 34.

  2. Solve for x in the equation: 2x + 8 = 20.

    Answer: 6

    Explanation: Subtract 8 from both sides to isolate 2x, then divide both sides by 2.

  3. What is the perimeter of a rectangle with a length of 10 cm and a width of 6 cm?

    Answer: 32 cm

    Explanation: Perimeter = 2 (length + width). Substitute the given values: Perimeter = 2(10 cm + 6 cm) Perimeter = 2(16 cm) Perimeter = 32 cm So, the perimeter of the rectangle is 32.

  4. If a triangle has sides of lengths 7 cm, 10 cm, and 15 cm, what type of triangle is it?

    Answer: Scalene

    Explanation: A scalene triangle has all sides of different lengths.

  5. What is the next term in the sequence: 2, 5, 8, 11, ...?

    Answer: 14

    Explanation: The sequence increases by 3 each time, so the next term is 11 + 3 = 14.

  6. Solve for x in the equation: 3 (x−2) = 15.

    Answer: 7

    Explanation: Distribute the 3, then isolate x by adding 6 to both sides. So, the solution to the equation 3 (x−2) = 15 is x = 7.

  7. What is the sum of the interior angles of a triangle?

    Answer: 180 degrees

    Explanation: The sum of interior angles in any triangle is always 180 degrees.

  8. What is the median of the following set of numbers: 7, 12, 5, 9, 14?

    Answer: 9

    Explanation: To find the median of a set of numbers, you arrange the numbers in ascending order and then find the middle value. The set of numbers in ascending order is: 5, 7, 9, 12, 14. Since there are an odd number of values in the set (5 values), the median is the middle number, which is 9.

  9. Solve for x in the equation: 2x − 5 = 13.

    Answer: 10

    Explanation: Add 5 to both sides to isolate 2x, then divide both sides by 2.

  10. If a triangle has side lengths of 3 cm, 4 cm, and 5 cm, what type of triangle is it?

    Answer: Right

    Explanation: The side lengths satisfy the Pythagorean theorem, making it a right triangle.

  11. What is the next term in the sequence: 2, 5, 9, 14, ...?

    Answer: 20

    Explanation: The sequence increases by consecutive odd numbers (3, 4, 5), so the next difference is 6, making the next term 14 + 6 = 20.

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