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RE: Daily quiz #010 - can we replace the ?
98 - take the first number 64 add 6+4=10 then 64+10=74, 74 add 7+4=11 then 74 +11=85, 85 - 8+5=13 so 85+13=98, 98 - 9+8=17 so 98+17=115, then 115- 1+1+5=7 so 115+7=122
congratulations mate you won the quiz