Jibu ni E.
Japo nimemaliza shule kitambo sikujishughulisha na elimu ikiwemo kukumbuka kanuni za hisabati, ila hesabu ambazo hazisahauliki ni linear algebra, nyingine kwa mbali logarithms. Hizo hata nikurupuke usiku wa manane sikosi.
Place six matches as shown, and then shift one match without touching the others so that the new arrangement shall represent an arithmetical fraction equal to I. The match forming the horizontal fraction bar must not be the one moved.