In some code, letters P, Q, R, S, T represent numbers 4, 5, 10, 12, 15. It is not known which letter represents which number. If Q - S = 2S and T = R + S + 3, then what is the value of P + R - T?
A
1
B
2
C
3
D
Cannot be determined due to insufficient data
Correct Answer: Option B
Explanation
1. **Simplify the First Rule**: The question says $Q - S = 2S$. If we rearrange this, we get **$Q