Question

13. A number ending in 9 will have the units place of its square as
(a) 3 (b) 9 (c) 1 (d) 6
14. Which of the following cannot be a perfect square?
(a) 841 (b) 529 (c) 198 (d) All of the above
15. The one's digit of the cube of 23 is
(a) 6 (b) 7 (c) 3 (d) 9​

Answer 1

Step-by-step explanation:

13. (a) 3

14. (c)198

15. no any option

Answer 2

Answer:

13) 1

14) 198

15) 7

Step-by-step explanation:

13) The square of 9 is 81, and the unit place of square of 9 is 1 . so a number ending in 9 will have the units place of its square as :1