1. The problem asks to find the union of set A and its complement A'. The union of a set and its complement is the universal set, but the choices include A' and A U B etc. The correct answer is c. A U B is not correct, since B is not defined, while union of A and A' gives the universal set. The closest correct choice is c. A U B seems typo, so choice a. A' or c. AUB does not fit. The intended correct answer is c. A U B but more correctly it should be Universal set. 2. Round off 4046 to the nearest thousand. Nearest thousand to 4046 is 4000. Answer: d. 4000 3. a×(b+c)=a×b+a×c is the distributive property. Answer: b. Distributive property 4. The set that contains all sets under consideration is the Universal set. Answer: a. Universal set 5. Sets with the same elements are called equal sets. Answer: a. Equal 6. The members or objects of a set are called elements. Answer: a. element 7. 0.004 as a fraction is 4/1000. Answer: a. 4/1000 8. A={2,3,5,7,11} are prime numbers. Answer: b. Prime 9. In proportion A:b = c:d, b:c is called means. Answer: a. Means 10. 0.41 is less than 1. Answer: b. < 11. Set of stars in the sky is an example of infinite set. Answer: b. Infinite set 12. -3 + (-4) equals -4 + (-3), so = Answer: a. = 13. Set of Z denotes integers. Answer: c. Integers 14. Describing set in statements is called descriptive form. Answer: b. Descriptive 15. 2 is the only even prime number. Answer: a. 2 16. 4.46768 rounded to 3 decimal places is 4.468. Answer: a. 4.468 17. HCF of 24 and 27 is 3. Answer: b. 3 18. 1 is neither prime nor composite. Answer: a. 1 19. SP-CP equals profit. Answer: b. Profit 20. 9 - 9 equals 0. Answer: b. 0