Chapter Exam

Chapter-1 Numbers — Online MCQ Test

Q: Which of the following is the correct form of a rational number?

Answer: A. p/q, where p and q are integers and q ≠ 0 — A rational number is any number that can be written as p/q, where p and q are integers and q is not zero.

Q: What is the multiplicative inverse of -5/7?

Answer: D. -7/5 — The multiplicative inverse of a non-zero rational number a/b is b/a. Hence, the inverse of -5/7 is -7/5.

Q: Find the value of (-3/4) + (5/6).

Answer: A. 1/12 — The LCM of 4 and 6 is 12, so -3/4 = -9/12 and 5/6 = 10/12. Their sum is 1/12.

Q: Arrange the rational numbers -5/8, -7/10, 3/4 and 1/2 in ascending order.

Answer: B. -7/10, -5/8, 1/2, 3/4 — -7/10 = -0.7 and -5/8 = -0.625, so -7/10 is smaller. Among the positive numbers, 1/2 is smaller than 3/4.

Q: Find the rational number which must be added to -3/7 to get 5/14.

Answer: C. 11/14 — Let the required number be x. Then x + (-3/7) = 5/14, so x = 5/14 + 3/7 = 5/14 + 6/14 = 11/14.

MATHS · Samacheer Kalvi 8th · Tamil Nadu State Board

Practice Chapter-1 Numbers with a free chapter-wise online MCQ test for Tamil Nadu State Board Samacheer Kalvi 8th MATHS. This chapter covers: rational numbers properties operations Covers rational numbers properties and operations. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-1 Numbers — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board Samacheer Kalvi 8th MATHS — Chapter-1 Numbers, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is the correct form of a rational number?

A. p/q, where p and q are integers and q ≠ 0 ✓
B. p/q, where p and q are integers and q = 0
C. p/q, where only p is an integer
D. p/q, where p and q are natural numbers only

Answer: A. p/q, where p and q are integers and q ≠ 0
A rational number is any number that can be written as p/q, where p and q are integers and q is not zero.

What is the multiplicative inverse of -5/7?