JSFiddle - React, Tailwind, and code Playground

by Xeon06

JavaScript

var numbers = [51255, 25, 9214, 13135, 25123];

function weird_round(a) {
    var len = a.toString().length;
    var div = Math.pow(10, len - 2);
    return Math.ceil(a / 5 / div) * div * 5;
}

alert(numbers.map(weird_round));