multiple choice Questions for PHP

Question 3 If $v is 7, what is $v *= $V--;? A) 42 B) 41 C) 36 Question 5 Which statement is True ? A) PHP variables can begin with a number C) Use (curly braces) around variables to resolve ambiguities D) Use the triple equal sign to convert operand types Question 6 What folder does XAMPP use for web-facing documents ? B) htdocs C) webapps D) xampp Question 7 Which is an error ? B) str_len($var); C) print_r($arr); D) number_format($num,0)