Aptitude Flashcards
7 cards from real Numerical Reasoning practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Aptitude flashcards as text
A bag contains 4 red, 6 blue, and 5 green marbles. What is the probability of picking a blue marble at random?
Answer: 2/5
P(blue) = 6/15 = 2/5.
A worker completes 3/8 of a task in 6 hours. At the same rate, how many hours will the full task take?
Answer: 16
6 hours covers 3/8, so full task = 6 / (3/8) = 6 x (8/3) = 16 hours.
The price of a stock fell from $80 to $68. What is the percentage decrease?
Answer: 15%
Decrease = 12; 12/80 x 100 = 15%.
A square has an area of 196 sq cm. What is its perimeter?
Answer: 56 cm
Side = square root of 196 = 14 cm; perimeter = 4 x 14 = 56 cm.
A store bought 200 items at $4 each and sold all of them at $6.50 each. What was the total profit?
Answer: $500
Profit per item = $2.50; total profit = 200 x $2.50 = $500.
Which value is closest to the square root of 200?
Answer: 14.1
14 squared = 196 and 15 squared = 225; the square root of 200 is approximately 14.14.
A fundraiser collected $3,240 from 180 donors. If 60 additional donors each give the same average amount, what will the new total be?
Answer: $4,320
Average = $18; 60 x $18 = $1,080; new total = $3,240 + $1,080 = $4,320.