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Algebra and Geometry Flashcards

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

Read the first 6 Algebra and Geometry flashcards as text

  1. If one angle of a parallelogram is 60°, what is the adjacent angle?

    Answer: 120°

    Adjacent angles of a parallelogram are supplementary (sum = 180°). Adjacent angle = 180° - 60° = 120°.

  2. Solve for x: 3x/4 - 2 = 7

    Answer: 12

    3x/4 - 2 = 7 → 3x/4 = 9 → 3x = 36 → x = 12.

  3. What is the volume of a cube with side 5 cm?

    Answer: 125 cm³

    Volume of cube = side³ = 5³ = 125 cm³.

  4. The factorization of x² - 9 is:

    Answer: (x + 3)(x - 3)

    x² - 9 = x² - 3² = (x + 3)(x - 3), using the difference of squares identity a² - b² = (a+b)(a-b).

  5. The circumference of a circle is 44 cm. What is its radius? (Use π = 22/7)

    Answer: 7 cm

    Circumference = 2πr → 44 = 2×(22/7)×r → 44 = 44r/7 → r = 7 cm.

  6. Two supplementary angles are in the ratio 2:3. What is the measure of the larger angle?

    Answer: 108°

    Supplementary angles sum to 180°. Let angles be 2x and 3x. 2x + 3x = 180 → x = 36. Larger angle = 3×36 = 108°.

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