NRICH: Multiplication Mistake Age
NRICH: Multiplication Mistake Age
Jane accidentally multiplied by 54 instead of 45, and her answer was 198 too big. What number did she multiply 54 by?
Jane made a mistake when writing down a multiplication, and she multiplied by 54 instead of 45.
Her answer was 198 more than it should have been.
What number did she multiply 54 by?
This problem is adapted from the World Mathematics Championships
You can find more short problems, arranged by curriculum topic, in our short problems collection.
Ages 11 to 14
NRICH (University of Cambridge)
Math Topics
Algebra & Pre-Algebra, Equations
Middle School, High School
6th Grade, 7th Grade, 8th Grade, 9th Grade
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NRICH (University of Cambridge)
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Resource k12
NRICH: Multiplication Mistake Age
Jane accidentally multiplied by 54 instead of 45, and her answer was 198 too big. What number did she multiply 54 by?
Jane made a mistake when writing down a multiplication, and she multiplied by 54 instead of 45.
Her answer was 198 more than it should have been.
What number did she multiply 54 by?
This problem is adapted from the World Mathematics Championships
You can find more short problems, arranged by curriculum topic, in our short problems collection.
Ages 11 to 14
NRICH (University of Cambridge)
Math Topics
Algebra & Pre-Algebra, Equations
Middle School, High School
6th Grade, 7th Grade, 8th Grade, 9th Grade
What are you looking for?
Organization
NRICH (University of Cambridge)
Website URL
Type of Resource
Challenge