If P denotes ‘+’, Q denotes ‘–‘, R denotes ‘×’ and S denotes ‘÷’, then which of the following statement is correct ?

1) 16 R 12 P 49 S 7 Q 9 = 200
2) 32 S 8 R 9 = 160 Q 12 R 12
3) 8 R 8 P 8 S 8 Q 8 = 57
4) 36 R 4 S 8 Q 7 P 4 = 10

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 ‘P’ means ‘divided by’, ‘R’ means ‘multiplied by’, ‘T’ means ‘added to’ and ‘W’ means ‘subtracted from’, then; 60 T 48 P 8 W 6 R 9 = ? 

1) 12
2) 61 ¹⁄₂₃
3) – 40 ¹⁄₂
4) 24

Find the quadratic equations whose roots are the reciprocals of the roots of 2x² + 5x + 3 ?

1) 3x² + 5x + 2 = 0
2) 5x² + 3x + 2 = 0
3) 3x² − 5x − 2 = 0
4) None

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