Question

Ai giúp mình với đang gấp lắm ạ:((cảm ơn

Answer 1

A= 360

B=9270

Answer 2

a) Có: \(\overline{3ab}⋮2,\overline{3ab}⋮5\)

\(\Rightarrow\overline{3ab}⋮10\Rightarrow b=0\)

Để \(\overline{3a0}⋮3,\overline{3a0}⋮9\Rightarrow3+a+0⋮9\left(vì9⋮3\right)\)

\(\Rightarrow3+a⋮9\)

\(\Rightarrow a=6\)

Vậy...

b) Có: \(\overline{a27b}⋮2,\overline{a27b}⋮5\)

\(\Rightarrow\overline{a27b}⋮10\)

\(\Rightarrow b=0\)

Để \(\overline{a270}⋮3,\overline{a270}⋮9\Rightarrow a+2+7+0⋮9\left(vì9⋮3\right)\)

\(\Rightarrow a+9⋮9\)

\(\Rightarrow a=9;a=18\)

Vậy...