Bsic Algebra

May 13th, 2015
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1. Which one of the following is not a prime number?2. It is being given that (232 + 1) is completely divisible by a whole number. Which of the following numbers is completely divisible by this number?

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Numbers1.Which one of the following is not a prime number?A.31B.61C.71D.91Answer & ExplanationAnswer:OptionDExplanation:91 is divisible by 7. So, it is not a prime number.View AnswerWorkspaceReportDiscuss in Forum2.(112 x 54) = ?A.67000B.70000C.76500D.77200Answer & ExplanationAnswer:OptionBExplanation:(112 x 54) = 112 x104=112 x 104=1120000= 7000022416View AnswerWorkspaceReportDiscuss in Forum3.It is being given that (232+ 1) is completely divisible by a whole number. Which of the following numbers is completely divisible by this number?A.(216+ 1)B.(216- 1)C.(7 x 223)D.(296+ 1)Answer & ExplanationAnswer:OptionDExplanation:Let 232=x. Then, (232+ 1) = (x+ 1).Let (x+ 1) be completely divisible by the natural number N. Then, (296+ 1) = [(232)3+ 1] = (x3+ 1) = (x+ 1)(x2-x+ 1), which is completely divisible by N, since (x+ 1) is divisible by N. View AnswerWorkspaceReportDiscuss in Forum4.What least number must be added to 1056, so that the sum is completely divisible by 23 ?A.2B.3C.18D.21E.None of theseAnswer & ExplanationAnswer:OptionAExplanation:23) 1056 (4592---136115---21---Required number = (23 - 21) = 2. View AnswerWorkspaceReportDiscuss in Forum5.1397 x 1397 = ?A.1951609B.1981709C.18362619D.2031719E.None of theseAnswer & ExplanationAnswer:OptionAExplanation:1397 x 1397=

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