Stanford Achievement Mathematics Problem Solving Flashcards
7 cards from real Stanford Achievement 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 Stanford Achievement Mathematics Problem Solving flashcards as text
A bag contains 4 red marbles, 3 blue marbles, and 5 green marbles. If one marble is picked at random, what is the probability it is blue?
Answer: 3/12
There are 3 blue marbles out of 12 total (4+3+5=12), so the probability is 3/12.
Sarah earns $8.50 per hour. If she works 6 hours on Saturday and 4 hours on Sunday, how much does she earn in total?
Answer: $85.00
She works 6+4=10 hours total; 10 × $8.50 = $85.00.
A rectangle has a length of 12 cm and a width of 7 cm. What is its area?
Answer: 84 cm²
Area of a rectangle = length × width = 12 × 7 = 84 cm².
If 3n + 7 = 25, what is the value of n?
Answer: 6
Subtracting 7 from both sides gives 3n = 18, so n = 18 ÷ 3 = 6.
A train travels at 60 miles per hour. How many miles does it travel in 2 hours and 30 minutes?
Answer: 150 miles
2 hours 30 minutes = 2.5 hours; 2.5 × 60 = 150 miles.
What is 15% of 240?
Answer: 36
15% of 240 = 0.15 × 240 = 36.
A store sells apples for $0.45 each. Marcus buys 12 apples and pays with a $10 bill. How much change does he receive?
Answer: $4.60
12 × $0.45 = $5.40 cost; $10.00 − $5.40 = $4.60 change.
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