Question

Scrieti toate numerele de forma 23x in baza 10 divizibile cu: a) 2; b) 5; c)3; d) 3; e) 4; f) 9.

Answer 1

23x= 2*100+3*10+x
a) 2= 230,232,234,236,238
b)5= 230,235
c)3=233,236,239
d) 4= 234,238
e) 9=239

Answer 2

23x in baza zece divizibile cu:
a) 2
x={0,2,4,6,8}
23x={230,232,234,236,238}

b)5
x={0,5}
23x={230,235}

c)3
x={1,4,7}
23x={231,234,237}

e)4
x={2,6}
23x={232,236}

f)9
x={4}
23x={234}