Algebra Puzzle – Challenge 32
This is a great mathematics challenge for those who love critical thinking problems. Let's challenge your brain!
Challenge:
If 8 workers can build a house in 20 days, how many workers is needed to build the house in 4 days?
A- 12
B- 26
C- 32
D- 40
E- 44
The Absolute Best Book to challenge your Smart Student!
The correct answer is D.
Keep in mind that the number of workers and the number of days are inversely proportional. It means that with more workers, it takes less time to build a house.
First, find the constant. W (number of workers) × D (days) = 8 × 20 = 160
Then, W × 4 (days) = 160 → W = 40
40 workers are needed to build the house in 4 days!
Reza is an experienced Math instructor and a test-prep expert who has been tutoring students since 2008. He has helped many students raise their standardized test scores--and attend the colleges of their dreams. He works with students individually and in group settings, he tutors both live and online Math courses and the Math portion of standardized tests. He provides an individualized custom learning plan and the personalized attention that makes a difference in how students view math.
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