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# HELP

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What is the smallest positive integer that is the sum of a multiple of 15 and a multiple of 21? (Remember that multiples can be negative.)

Apr 6, 2020
edited by qwertyuiopasdfghjkl  Apr 6, 2020

#10
+252
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I got three

-2(21)+3(15)=-42+45=3

Apr 6, 2020

#1
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multiple of what? they are blnk.

Apr 6, 2020
#2
+201
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Sorry, the numbers are 15, 21(in order)

Apr 6, 2020
#3
+98
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yep the Q guy is right

Apr 6, 2020
#4
+201
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Ok, i fixed the question. If anyone could figure this out, that would be great!

Apr 6, 2020
#5
+98
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i can just give me the link

grannygod123  Apr 6, 2020
#6
+201
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Ummm.. what does that mean?

Apr 6, 2020
#8
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i refreshed the page i cant see it

grannygod123  Apr 6, 2020
#7
+111360
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I get 6

(-15)  is a  multiple  of 15

(21)  is a multiple  of 21

So

-15  + 21  =

6

Anyone  have a different (better) answer   ???

Apr 6, 2020
#9
+98
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36 beachuse

1+2=3

and 5+1=6 so

it is 36

Apr 6, 2020
#10
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I got three

-2(21)+3(15)=-42+45=3

MooMooooMooM Apr 6, 2020
#11
+98
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so who's right

grannygod123  Apr 6, 2020
#12
+98
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so who's right :/

grannygod123  Apr 6, 2020
#13
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CPhill  Apr 6, 2020
#14
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but why would he answer his own Q

grannygod123  Apr 6, 2020
#15
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How about: -7(15) + 5(21) = 0

Guest Apr 6, 2020
#16
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That doesn't work becuase the question asks for "What is the smallest positive integer..." and 0 is not positive.

Hope it helps!

HELPMEEEEEEEEEEEEE  Apr 6, 2020
#17
+111360
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******

CPhill  Apr 6, 2020
edited by CPhill  Apr 6, 2020