2 lần

theo bài toán ta có :

\(x:3\left(2\right);x:4\left(2\right);x:5\left(2\right)x< 500\)

\(\Rightarrow\) \(x-2\in BC\left(3,4,5\right)\)

\(3=3\)

\(4=2^2\)

\(5=5\)

\(BCNN\left(3,4,5\right)=60\)

\(BC\left(3,4,5\right)=\left\{0,60,120,180,240,300,360,...\right\}\)

vì \(x:3\left(2\right);x:4\left(2\right);x:5\left(2\right)x< 500\) \(\Rightarrow x=60+2=62\)

\(=120+2=122\)

\(=180+2=182\)

\(=240+2=242\)

\(=300+2=302\)

\(=360+2=362\)

\(=420+2=422\)

\(=480+2=482\)

mình thiên bình đây ! mình thích hợp làm sứ giả lắm á hehe .