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ŕ¤ŕ¤żg.14. 82 : R Gbk S ?1) 63 2) 12 3) 821) 32 |
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Answer» Let 82:72::72:x=>82x=72×72=>x=63 Option 1 is correct. I cannot understand Let the missing number here(?) be x. When 4 numbers are in continued proportion,a:b::c:d=>ad=bc |
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