There are beads of four colors, a total of 190 red, white, and yellow beads, and a total of 50 yellow and blue beads. The ratio of the number of yellow beads to the number of other three kinds of beads is 1:4, how many blue beads are there?
有四种颜色的珠子，红、白、黄三种珠子共190个，黄、蓝两种珠子共50个．黄珠的个数与其余三种珠子个数的比为1：4，蓝珠有多少个？
<gadget id="calculator">50 + 190</gadget>
<output>240</output>

<gadget id="calculator">1 + 4 + 1</gadget>
<output>6</output>

<gadget id="calculator">240 / 6</gadget>
<output>40</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<result>10</result>