In this question, α stands for ‘equal to’; β for ‘greater than’; γ for ‘less than’ and δ for ‘not equal to’.

If 6x α 5y and 2y β 3z, then 

1) 2x β 3z
2) 4x β 3z
3) 2x γ z
4) 4x α 3z

In a group of buffaloes and ducks the number of legs are 24 more than twice the number of heads. What is the number of buffaloes in the group ? 

1) 6
2) 18
3) 12
4) 24

‘+’ means ‘×’, ‘–’ means ‘÷’, ‘÷’ means ‘+’ and ‘×’ means ‘–’; then what will be the value of the following expression?

540 – 36 + 12 ÷ 75 × 55

1) 255
2) 512
3) 200
4) 235

If ‘–’ means addition, ‘×’ means subtraction, ‘÷’ means multiplication and ‘+’ means division; then what will be the value of the following expression?

20 × 12 + 4 – 16 ÷ 5 = ?

1) 17
2) 80
3) 63
4) 97

If - means, + means x, means -, x means +, then which of the following equations is correct?

1) 52 4 + 5 x 8 – 2 = 36
2) 43 x 7 5 + 4 – 8 = 25
3) 36 × 4 -12 + 5 3 = 420
4) 36 – 12 x 6 3 + 3 = 60