JSFiddle - React, Tailwind, and code Playground

JavaScript

var nKids = 16,
    nWheels = 38,
    nBicycles, nTricycles;

while (true) {
    nBicycles = Math.floor((nKids + 1) * Math.random());
    if (2 * nBicycles + 3 * (nKids - nBicycles) === nWheels)
        break;
}
alert("Number of bicycles is " + nBicycles);