RAILWAY EXAM
SUBJECT: MATHEMATICAL OPERATION
1. If x means +, ÷ means –, – means x and + means ÷, then 8 x 7 – 8 + 40 ÷ 2 =?
(A) 1 (B) 7 2/5 (C) 8 3/5 (D) 44
Answer: B
Explanation:
Using the given symbols, we have:
Given expression = 8 + 7 × 8 ÷ 40 – 2 = 8 + 7 × ⅕ – 2 = 37/2 = 7 ⅖
2. If L denotes x, M denotes ÷, P denotes + and Q denotes –, then 16 P 24 M 8 Q 6 M 2 L 3 =?
(A) 13/2 (B) – 1/6 (C) 14 ½ (D) 10
Answer: D
Explanation:
Using the proper symbols,
Given expression = 16 + 24 ÷ 8 – 6 ÷ 2 × 3 = 16 + 3 – 3 × 3 = 16 + 3 – 9 = 10
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