<p>its both.
first 15 problems or so are relatively easy.
Then, from on, you need to think rele creatively or more knowledge might actually help u.
Although calculus does not help at all I believe.</p>
<p>its both.
first 15 problems or so are relatively easy.
Then, from on, you need to think rele creatively or more knowledge might actually help u.
Although calculus does not help at all I believe.</p>