# FAQ: Working with Numbers - Built-In Methods

This community-built FAQ covers the “Built-In Methods” exercise from the lesson “Working with Numbers”.

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This exercise can be found in the following Codecademy content:

Learn C#

## FAQs on the exercise Built-In Methods

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This was a little confusing as I didn’t know where to add ‘Math.Floor(Math.Sqrt(Math.Abs(number)));’ (Step 4).
At first, I was trying to put it into the Math.Floor for numberTwo and tried a couple of different things before I realised that the Math.Foor is also in the double!

Could do with a little more clarity here to specify further where Math.Abs() should go. I worked it out eventually, which I suppose is positive for an aspiring coder!

``````using System;

namespace LowestNumber
{
class Program
{
static void Main(string[] args)
{
// Starting variables
int numberOne = 12932;
int numberTwo = -2828472;

// Use built-in methods and save to variable
Math.Sqrt(numberOne);
Math.Floor(Math.Sqrt(numberOne));
double numberOneSqrt = Math.Floor(Math.Sqrt(numberOne));

// Use built-in methods and save to variable
Math.Sqrt(numberTwo);
Math.Floor(Math.Sqrt(numberTwo));
double numberTwoSqrt = Math.Floor(Math.Sqrt(Math.Abs(numberTwo)));

// Print the lowest number
Console.WriteLine(Math.Min(numberOneSqrt, numberTwoSqrt));

}
}
}

``````