Multiple choice

In a Mathematics quiz, Rahul got four statements, out of which, he needed to identify the incorrect statement. If the identification of every wrong statement earned him 1 point, which of the following statements did he choose?

  1. Subtraction is commutative for integers.

  2. Integers are closed under addition.

  3. Addition is associative for integers

  4. Integers are closed under subtraction.

  5. Integers are closed under multiplication.
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A Correct answer
Explanation

Subtraction is not commutative for integers. For example, the results of 7 – (–1) and (–1) – 7 respectively, are not equal.7 – (–1) = 7 + 1 = 8 and (–1) – 7 = –87 – (–1) ≠ (–1) – 7. Thus, the statement given in the above option is incorrect. This answer is correct.

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