(236) 4

Part of 1989 Tournament Of Towns

Problems(1)

TOT 236 1989 Autumn O S4 digits of 2^{1989} ,5^{1989} in a row

Source:

2^{1989}

5^{1989}

are written out one after the other (in decimal notation). How many digits are written altogether?
(G. Galperin)

number theoryDigits