Of the cleanly formulated Hilbert problems , problems 3 , 7 , 10 , 11 , 13 , 14 , 17 , 19 , 20 , and 21 have a resolution that is accepted by consensus .
Of the cleanly-formulated Hilbert problems , problems 3 , 7 , 10 , 11 , 13 , 14 , 17 , 19 , 20 , and 21 have a resolution that is accepted by consensus .