Illuminations: Two Months

In 2008, September and December both began on a Monday. But every year, there are two months that do not begin on the same day of the week as any other month. What are those two months?

This brainteaser was written by Derrick Niederman.

VIEW SOLUTION

National Council of Teachers of Mathematics

Math Topics

Deductive Reasoning & Logical Thinking

K-6, Middle School, High School

5th Grade, 6th Grade, 7th Grade, 8th Grade, 9th Grade, 10th Grade, 11th Grade, 12th Grade

Math Puzzles

Download PDFs

PDF File

Descriptions of PDFs

Problem and solution

RELATED LISTINGS

Illuminations (National Council of Teachers of Mathematics)

National Council of Teachers of Mathematics

Illuminations works to serve you by increasing access to quality standards-based resources for teaching and learning mathematics, including interactive tools for students and instructional support for teachers.

https://illuminations.nctm.org/Content.aspx?id=58

What are you looking for?

Organization

National Council of Teachers of Mathematics

Website URL

https://illuminations.nctm.org/BrainT...

Type of Resource

Activity Sheet
PDF File

Assigned Categories

Math
Math - Other

Resource k12

K-12 Categories

Advanced Search

Submit a Resource

Illuminations: Two Months

In 2008, September and December both began on a Monday. But every year, there are two months that do not begin on the same day of the week as any other month. What are those two months?

This brainteaser was written by Derrick Niederman.

VIEW SOLUTION