5) What of 1322,872, 722 and 2092 would end with digit 1 ?
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Given : 132² , 87² , 72² , 209²
To Find : which would end with digit 1
Solution:
132² , 87² , 72² , 209²
132² ends with digit 4
87² ends with digit 9
72² ends with digit 4
209² ends with digit 1
Hence correct answer is 209²
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