If 'P' means '±', 'Q' means '×', 'R' means '+' and 'S' means '−', then 16 Q 12 P 6 R 2 S 4 = ?
Show answer & explanation
Correct answer: A
Explanation
P = ÷
Q = ×
R = +
S = −
16 Q 12 P 6 R 2 S 4
Reversing the signs,
16×12÷6+2−4=?
16×2+2−4=?
32+2−4=?
? = 30