function countEvenNumbers(numbers: number[]): number {
  return numbers.reduce((prevNum, currentNum)=>{
    const remainder = currentNum % 2;
    const isEven = remainder === 0;
    if(isEven){
      return prevNum + 1
    }
    return prevNum;
  },0);
}

// No modificar: necesario para evaluar el resultado.
export { countEvenNumbers };