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Question
Which of the following numbers will not have 1 (one) at their unit’s place :
(i) 322
(ii) 572
(iii) 692
(iv) 3212
(v) 2652
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Solution
The square of the following numbers will not have 1 at their units place: as only (1)2 = 1, (9)2 = 81 have 1 at then units place
322, 572, 2652 i.e., (i), (ii) and (v)
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