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It can be: 3*17 = 51 or 1*51 = 51
9 does.
25
36
1+1 , 1 times 2+0
1 x 81 3 x 27 9 x 9
(21,3)(9,7)
6 x 9
56 x 2
1x52, 2x26, 3x13
2 x 13
100 x 10
17 x 5
It is: 50/7 times 7 = 50
3x7=21 , 1x21=21..