Question

12. Which of the following number would have digit 6 at units place? (a) 19² (b) 24² (c) 25² (d) 13²

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Answer 1

Answer: (b) 24²

Step-by-step explanation

24² = 24*24

When multiplying the units digits of 24 and 24, we get 4*4 = 16. The units digit of this sub-result is the units digit of 24²

A calculator can be used to confirm the answer.

24² = 24*24 = 576