If a * b = ab + b - a, what is the value of c such that c * (2 * 5) = 97?

If ÷ means +, - means ÷, x means - and + means x, then the value of ((36x4)-8x4)/(4+8×2+16÷1) is

If a ÷ b means 'a to be added to b' and a × b means 'a to be divided by b', then the value of (14 ÷ 7) ÷ (14 × 7) is

If '<' means 'minus', '>' means 'plus', '=' means 'multiplied by' and '' means 'divided by', then what would be the value of 27 > 81 9 < 6?

If 4 + 5 - 2 = 33 and 10 + 12 - 5 = 119, then 6 + 8 - 3 =

If + means multiplication, ÷ means subtraction, − means addition and × means greater than, which expression is correct?