Numerical Reasoning Flashcards

A staffing database shows 320 employees: 45% are female, 30% are under 35, and 15% are both female AND under 35. What percentage are female OR under 35?

Answer: 60%

Using inclusion-exclusion: 45% + 30% minus 15% = 60%.

A procurement order: 20 units of Item A at $15, 15 units of Item B at $28, and 40 units of Item C at $9. What is the total order cost?

Answer: $1,080

(20×$15) + (15×$28) + (40×$9) = $300 + $420 + $360 = $1,080.

Costs increased 20% in Year 1, then decreased 15% in Year 2. If the original cost was $10,000, what is the final cost?

Answer: $10,200

$10,000 × 1.20 = $12,000; $12,000 × 0.85 = $10,200.

Team A processes 120 aid requests per day; Team B processes 90 per day. Working together, how many days to process 1,050 requests?

Answer: 5 days

Combined rate = 120 + 90 = 210 per day; 1,050 ÷ 210 = 5 days.

Monthly refugee registrations: Jan 1,200; Feb 1,500; Mar 1,350; Apr 1,800. What is the median number of registrations?

Answer: 1,425

Sorted: 1,200; 1,350; 1,500; 1,800 — median = (1,350 + 1,500) ÷ 2 = 1,425.

An office uses 3.5 reams of paper per week at $6.40 per ream. What is the annual paper cost over 52 weeks?

Answer: $1,164.80

3.5 × 52 = 182 reams; 182 × $6.40 = $1,164.80.

A grant of $360,000 is split: Region X receives 5/12 and Region Y receives 1/4. How much does Region Z (the remainder) receive?

Answer: $120,000

5/12 + 1/4 = 5/12 + 3/12 = 8/12 = 2/3; remainder = 1/3 × $360,000 = $120,000.