Fill the ? in equation 3 ? 3 ? 3 ? 3 ? 3 = 0 to make it true but allowed to use only two different types of operators? what would be those two operators and how will it be achieved.

Note: You are not allowed to add parentheses to the above expression

3 * 3 - 3 - 3 - 3 = 0

? ? x ?

? ? ?

If possible fill + or - for o and make this true, if not possible then provide the reasoning...

1 o 1/2 o 1/3 o 1/4 o 1/5 o 1/6 o 1/7 o 1/8 o 1/9 o 1/10 o 1/11 o 1/12 = 0

Fill below squares with all the integers from 1 to 18 (using each number only once), such that each equation holds true?

Can you fill in the blank with + and - to make this equation true?

1 ◻ 2 ◻ 3 ◻ 4 ◻ 5 ◻ 6 ◻ 7 = 0