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Class 10

Forming and Classifying Pairs: Practice, Quiz

Five questions on forming and classifying pairs of equations. Pick one answer for each.

5 questions, one mark each. 3 to pass. Suggested time: 10 minutes. Your answers are not recorded.

  1. Two pencils and three erasers cost ₹ 4040; one pencil and two erasers cost ₹ 2424. With a pencil at ₹ xx and an eraser at ₹ yy, which pair fits?
  2. Ravi is 44 years older than his sister. In 33 years the sum of their ages will be 3030. With Ravi xx and his sister yy years old now, which pair is correct?
  3. Find kk so that 3x+4y=53x + 4y = 5 and 6x+ky=106x + ky = 10 have infinitely many solutions.
  4. Find mm so that mx+2y=3mx + 2y = 3 and 4x+8y=54x + 8y = 5 have no solution.
  5. Classify the pair x+2y=5x + 2y = 5 and 2x−y=52x - y = 5.
Unanswered questions are marked wrong.

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