Question

    ? % of (√144) × 25 + 390 =

    453
    A 21 Correct Answer Incorrect Answer
    B 20 Correct Answer Incorrect Answer
    C 25 Correct Answer Incorrect Answer
    D 15 Correct Answer Incorrect Answer

    Solution

    (x/100) x 12 x 25 + 390 = 453 3x = 453 – 390 3x = 63 x = 63/3 x = 21

    Practice Next