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Question

Simplify the following expression.

11 of 7 + 125 ÷ 5 + 99 ÷ 11 × 7 − 17 of 7 + 7 × 6 - (91 ÷ 7 + 7 × 5)

This question was previously asked in
RRB ALP 2025 CBT 2 Mechanic Motor Vehicle Question Paper (28-Jul-2026) (Shift 1)
The correct answer is

40

To simplify the given expression, we need to follow the BODMAS/BIDMAS rule, which stands for:

  • Brackets
  • Orders (i.e., powers and roots, etc.)
  • Division and Multiplication (left to right)
  • Addition and Subtraction (left to right)

Let's simplify the given expression step by step:

The given expression is: \(11 \text{ of } 7 + \frac{125}{5} + \frac{99}{11} \times 7 - 17 \text{ of } 7 + 7 \times 6 - \left(\frac{91}{7} + 7 \times 5\right)\)

  1. First, resolve the expressions inside the brackets:
    • \(\frac{91}{7} = 13\)
    • \(7 \times 5 = 35\)
    • So, \(\left(\frac{91}{7} + 7 \times 5\right) = 13 + 35 = 48\)
  2. Now, we will simplify the rest of the expression:
    • \(11 \text{ of } 7 = 11 \times 7 = 77\)
    • \(\frac{125}{5} = 25\)
    • \(\frac{99}{11} \times 7 = 9 \times 7 = 63\)
    • \(17 \text{ of } 7 = 17 \times 7 = 119\)
    • \(7 \times 6 = 42\)
  3. Substitute these back into the expression:
    • \(77 + 25 + 63 - 119 + 42 - 48\)
  4. Simplify step-by-step:
    • Addition: \(77 + 25 + 63 + 42 = 207\)
    • Subtraction: \(207 - 119 - 48 = 40\)

Thus, the simplified result of the expression is 40, which makes option 40 the correct answer.

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