Mathematical operations
1. If "+" means "×", "–" means "+", "×" means "÷", and "÷" means "–", then what is the value of: 8 + 4 – 6 × 2 ÷ 3 ?
A. 20
B. 22
C.32
D.34
C. 32
2. If "–" and "×" are interchanged, as well as "+" and "÷", then: 16 × 4 + 8 ÷ 2 – 3 = ?
A. 12
B. 21.5
C. 21
D. 18
B. 21.5
3. If 7 # 3 = 20, 5 # 2 = 14, then 9 # 5 = ?
A. 28
B. 32
C. 36
D. 40
A. 28
4. If 12 $ 4 = 4, 18 $ 6 = 3, then 24 $ 8 = ?
A. 2
B. 3
C. 4
D. 6
B. 3
5. If ">" means "+", " 4) ^ 2 v 4 < 2 = ?
A. 4
B. 6
C. 8
D. 10
A. 4
6 If 3*4 = 5, 5*12 = 13, then 7*24 = ?
A. 25
B. 26
C. 27
D. 28
A. 25
7. If 8 ? 3 = 19, 12 ? 5 = 29, then 15 ? 4 = ?
A. 32
B. 34
C. 36
D. 38
B. 34
8. If 'P' means '+', 'Q' means '–', 'R' means '×', and 'S' means '÷', then: 18 R 12 S 4 P 6 Q 2 = ?
A. 52
B. 55
C. 58
D. 62
C. 58
9. If 4 ★ 3 = 13, 5 ★ 4 = 21, 6 ★ 5 = 31, then 7 ★ 6 = ?
A. 43
B. 45
C. 47
D. 49
A. 43
10. Start with 12. Multiply by 3, subtract 6, divide by 2, add 5. What is the result?
A. 20
B. 22
C. 24
D. 26
A. 20