question,solution
"7 – 21 – 14 – 42 – 28 - ?",84
"289 - 240 - 198 - 163 - 135 - ?",86
"27 - 30 - 29 - 32 - 33 - ?",36
"10 - 15 - 22 - 31 - 42 - ?",55
"10 - 11 - 13 - 10 - 14 - ?",19
"2 - 4 - 3 - 9 - 8 - ?",64
"10 - 5 - 20 - 10 - 30 - ?",15
"54 - 52 - 26 - 24 - 12 - ?",10
"18 - 20 - 40 - 42 - 84 - ?",86
"2 – 7 – 22 – 67 – 202 - ?",607
"50 – 57 – 49 – 53 – 41 - ?",49
"16 – 22 – 34 – 58 – 106 - ?",202
"25 – 22 – 26 – 23 – 27 - ?",24
"121 – 11 – 16 – 4 – 9 - ?",3
"289 – 256 – 225 – 196 – 169 - ?",144
"16 – 14 – 17 – 13 – 18 - ?",12
"2 – 4 – 8 – 16 – 20 - ?",40
"1 – 3 – 2 – 6 – 5 - ?",15
"5 – 1 – 6 – 2 – 7 - ?",3
"9 – 8 – 7 – 3 – 2 - ?",1
"1 – 3 – 9 – 27 – 81 - ?",243
"50 – 48 – 24 – 22 – 11 - ?",9
"10 – 12 – 24 – 26 – 52 - ?",54
"2 – 6 – 8 – 24 – 26 - ?",78