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devon71
devon71 devon71
  • 09-05-2016
  • Mathematics
Answered

find the missing number ___:7 = 12:21


A.14

B.12

C.4

D.3

Verified Answer :

Cata9 Cata9
  • 13-04-2017

The question is asking us to "find the missing number ___:7 = 12:21
First, let's see how similar are 7 and 21 - 21 is 7 multiplied by 3. So the gap will be filled in by something that multiplied by 3 will give us 12. So we have : x*3=12, and also: x=12/4=4, so the answer is
C.4

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