text: 
  var Algo = function() {
      const twentyProblemArray = []
    
      var multiply = function () {
        var numberOne = Math.round(Math.random() * (15))
        var numberTwo = Math.round(Math.random() * (15))
        let multiplyObject = {}
        multiplyObject.problem = numberOne + '*' + numberTwo
        multiplyObject.result = JSON.stringify(numberOne * numberTwo)
     
        twentyProblemArray.push(multiplyObject)
    }
  
    var add = function(){
      var numberOne = Math.round(Math.random() * (50))
        var numberTwo = Math.round(Math.random() * (50))
        let multiplyObject = {}
        multiplyObject.problem = numberOne + '+' + numberTwo
        multiplyObject.result = JSON.stringify(numberOne + numberTwo)
     
        twentyProblemArray.push(multiplyObject)
    }
  
    var subtract = function() {
      var numberOne = Math.round(Math.random() * (100))
      var numberTwo = Math.round(Math.random() * (numberOne-1))
      let multiplyObject = {}
      multiplyObject.problem = numberOne + '-' + numberTwo
      multiplyObject.result = JSON.stringify(numberOne - numberTwo)
   
      twentyProblemArray.push(multiplyObject)
    }
    
    
    
    // var divide = function() {
    //     return 'divide'
    // }
    
      
      while (twentyProblemArray.length !== 15) {
        var startNumber = Math.round(Math.random() * (4 - 1) + 1)
          if (startNumber === 1) {multiply()}
           if (startNumber === 2) {add()}
           if (startNumber === 3) {subtract()}
           //if (startNumber === 4) {divide()}
      }
      
      return twentyProblemArray
    }
  
    module.exports = Algo