how to solve Fibonacci, prime and composite number and factorial using a single static class in typescirpt.

working link
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https://stackblitz.com/edit/typescript-be1art

these are some frequently asked question such as prime numbers, factorial and Fibonacci series for an interview purpose. I am trying to solve these question using a single static class in typescript.

here the whole code of my static class where I am using a single class to solve these problem's

class MathProblem

{

//Fibonacci series--------------------

static Fibonacci (max)

{

let a:number=0;

let b:number=1;

let f:number=1;

let series=[];

for(let i=0;i<=max;i++)

{

if(i===0)

{

f=0;

}else if(i===1)

{

f=1;

}

else

{

f=a+b;

a=b;

b=f;

}

series.push(f);

}

return series;

}

//factorial-----------------------

static factorial(max)

{

let r=1;

for(var i=1;i<=max;i++)

{

r*=i;

}

return r;

}

//http://www.softschools.com/math/prime_numbers/

static isPrimeNumber(request)

{

for(var i=2;i<request;i++)

{

if(request%i===0)

{

return false;

}

}

return true;

}

}

//getting prime number

//console.log(MathProblem.isPrimeNumber(43));

//getting Fibonacci

//console.log(MathProblem.Fibonacci(10));

//getting isPrimeNumber

//console.log(MathProblem.factorial(10));