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Numerical Reasoning: Calculations Flashcards

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  1. A humanitarian team distributed food rations to 1,440 families over 6 days. If the rate increases by 25% starting on day 7, how many families will be served on day 7?

    Answer: 300

    Daily average = 1,440 ÷ 6 = 240; day 7 = 240 × 1.25 = 300 families.

  2. A project timeline shows 3 tasks completed in 9 weeks. At the same rate, how many weeks will it take to complete the remaining 11 tasks?

    Answer: 33 weeks

    Rate = 9 ÷ 3 = 3 weeks per task; 11 tasks × 3 = 33 weeks.

  3. An office's electricity bill was $640 in January. The bill rose by 12.5% in February. What was the February bill?

    Answer: $720

    $640 × 1.125 = $720.

  4. Two staff members together process 480 files in 8 hours at equal rates. How many files does one person process in 5 hours?

    Answer: 150 files

    Combined rate = 480 ÷ 8 = 60 files/hour; one person = 30/hour; 30 × 5 = 150 files.

  5. A conference budget of $72,000 is allocated 40% to venue, 35% to travel, and the remainder to materials. How much is allocated to materials?

    Answer: $18,000

    Materials = 100% − 40% − 35% = 25%; $72,000 × 0.25 = $18,000.

  6. The exchange rate is 1 GBP = 1.27 USD. A purchase costs £3,800. What is the cost in USD?

    Answer: $4,826

    3,800 × 1.27 = $4,826.

  7. A supply convoy carries 5,400 kg of aid. After the first delivery, 62.5% of the load remains. How many kg were delivered?

    Answer: 2,025 kg

    Delivered = 100% − 62.5% = 37.5%; 5,400 × 0.375 = 2,025 kg.

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