Question

If A={ all natural numbers multiple of 7}, B={all whole numbers less than 20}, C={all positive 2-digit integers}.Then which of the following is not a universal set for the above sets.

Answer 1

Answer:

i) A = {..., −6, −4, 0, 2, 4, 6, ...}

(ii) B = {2}

(iii) C = {..., −5, −4, −3, −2, −1}

(iv) D = {SA, RE, GA, MA, PA, DHA, NI}