Property: If a number has a square root in N, then its unit digit must be 0, 1, 4, 5 or 9.
Units digit of square: | 0 | 1 | 4 | 5 | 6 | 9 |
Units digit of square root: | 0 | 1 or 9 | 2 or 8 | 5 | 4 or 6 | 3 or 7 |
What will be the "one's digit" in the square of 1234? | |||
Right Option : A | |||
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The unit digit of the square of 1230 is _________________
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Right Option : C | |||
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The unit digit of the square of 123 and 78 are __________ | |||
Right Option : D | |||
View Explanation |
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