Given that the units digit of A and A are the same where A^3 is a single digit natural number. How many possibilities can A assume ?
Given that the units digit of A and A are the same where A3 is a single digit natural number. How many possibilities can A assume ?
(A) 3
(B) 4
(C) 5
(D) 9
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2 Answers
Correct option is (C) 5
| A | \(A^3\) | unit digit of \(A^3\) |
| 1 | 1 | 1 |
| 2 | 8 | 8 |
| 3 | 27 | 7 |
| 4 | 64 | 4 |
| 5 | 125 | 5 |
| 6 | 216 | 6 |
| 7 | 343 | 3 |
| 8 | 512 | 2 |
| 9 | 729 | 9 |
Total possibilities A can assume is 5.
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