In an examination, a student gets 4 marks for every correct answer, 1 for every unattempted question and 0 for every wrong answer. If there are 30 questions, which of the following total scores is not attainable by a student?

Which of the following two signs needs to be interchanged to make the given equation correct? 24 − 8 / 4 + 5 × 3 = 14

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

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

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