JSFiddle - React, Tailwind, and code Playground

by Amir Danish

JavaScript

function MathChallenge(num) { 


 const digits=[...String(num)].map(Number);
  let bb=digits.reduce((iMax, x, i, arr) => x > arr[iMax] ? i : iMax, 0);
  return bb;
}
console.log(MathChallenge(453857));