Math Flashcards
7 cards from real Crossover Aptitude Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Math flashcards as text
What is the slope of the line passing through (2, 5) and (6, 13)?
Answer: 2
Slope = (13 - 5) / (6 - 2) = 8 / 4 = 2.
A 13-foot ladder leans against a wall with its base 5 feet from the wall. How high up the wall does it reach?
Answer: 12 feet
Height = √(13² - 5²) = √(169 - 25) = √144 = 12 feet.
If 2/3 of a number is 48, what is 3/4 of that number?
Answer: 54
The number = 48 × (3/2) = 72; (3/4) × 72 = 54.
Which expression equals (a + b)²?
Answer: a² + 2ab + b²
(a + b)(a + b) = a² + ab + ab + b² = a² + 2ab + b².
A data set contains: 4, 7, 7, 9, 13. What is the median?
Answer: 7
In an ordered set of 5 values, the median is the 3rd value: 7.
In how many different ways can 4 people be arranged in a line?
Answer: 24
4! = 4 × 3 × 2 × 1 = 24.
If log₂(x) = 5, what is x?
Answer: 32
log₂(x) = 5 means 2⁵ = x = 32.