If 27 * 4 = 77 and 31 * 9 = 239 then 21 * 6 = ?

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posted Jul 3, 2017 by Manoj Mishra

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27*4=108, 27+4=31, 108-31=77
31*9=279, 31+1=40, 279-40=239
21*6=126, 21+6=27, 126-27=99

the answer is 99

answer Jul 5, 2017 by Yücel Özcan

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