3. Some equations have been solved on the basis of a certain pattern. Find the correct answer for the unsolved equation on that basis: 2 x 3 x 5 = 523 6 x 4 x 1 = 164 8 x 2 x 4 = 482, then 6 x 8 x 2 = ?
4. If '+' means 'divided by', '' means 'multiplied by', 'x' means 'minus' and ' ÷ ' means 'plus', which of the following will be the value of the expression: 16 ÷ 8 - 4 + 2 x 4 = ?
8. In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question? 825 x 25 - 27 ÷ 10 = ?