Algebra Puzzle – Challenge 48
This is an interactive mathematical and logic puzzle prepared for anyone interested in school-level math and critical thinking.
Challenge:
12 years ago Michael was X times as old as Ryan was. If Michael is now 27 years old, how old is Ryan now in terms of X?
A- \(\frac{x}{15}\)
B- \(15x\)
C- \(\frac{15}{x}-12\)
D- \(\frac{15}{x}+12\)
E- \(\frac{x}{15}+12\)
The Absolute Best Book to challenge your Smart Student!
The correct answer is D.
12 years ago Michael was 15 years old. At that time, he was X times as old as Ryan was. Plug is a value for X. Let’s say X is 3. Therefore, Ryan was 5 years old 12 years ago. Now, Ryan is 17.
Plug in 3 for X and check all 5 options:
A. \(\frac{15}{3} = 3\),
B. \(15 × 3 = 45\),
C. \(\frac{15}{3} – 12= -7\),
D. \(\frac{15}{3} + 12 = 17\)! Bingo
E. \(\frac{3}{15} + 12 = \frac{123}{15}\)
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.
More math articles
- 6th Grade NSCAS Math Worksheets: FREE & Printable
- 4th Grade CMAS Math Worksheets: FREE & Printable
- How to Draw Geometric Shapes with given condition?
- Overview of the FTCE General Knowledge Math Test
- How to Identify Relations and Functions? (+FREE Worksheet!)
- Top 10 CBEST Math Practice Questions
- 4th Grade MAAP Math Worksheets: FREE & Printable
- 5th Grade SBAC Math Practice Test Questions
- How to Evaluate Trigonometric Function? (+FREE Worksheet!)
- Full-Length ISEE Lower Level Math Practice Test
What people say about "Algebra Puzzle - Challenge 48"?
No one replied yet.