A certain integer n is a multiple of both 5 and 9. Must n be a multiple of 15?

游客2025-02-24 24

问题 A certain integer n is a multiple of both 5 and 9. Must n be a multiple of 15?

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答案 The first step in solving this problem is to find the Least Common Multiple (LCM) of 5 and 9. Because a multiple of 5 must have either a 5 or a 0 in the digits place, and 9×5 is the first multiple of 9 with a 5 in the digits place, 9×5=45 must be the LCM. Therefore, n must be a multiple of 15, since 45 (one possible value of n) is a multiple of 15.

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A certain integer n is a multiple of both 5 and 9. Must n be a multiple of 15?

Acertainintegernisamultipleofboth5and9.Mustnbeamultipleof15?

When5consecutiveoddintegers,eachgreaterthan34areadded,whatisthesma

Theintegernisamultipleofboth5andWhichofthefollowingis(are)true?

Forhowmanypositiveintegersm≤100is(m-5)(m-45)positive?A、45B、50C、58

Onacertainnumberline,if-7isadistance4fromnand7isadistanceof18

Thesumofthefirst50positiveintegersis1,275.Whatisthesumoftheinteg

Acertainspiralstaircaseisdesignedsothateachstepafterthefirstoneis

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Whatistheleastcommonmultipleof3,4a,5b,and6ab?A、15abB、60abC、60a2bD、

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