My 5th grader brought this home on an assignment.
Post your answer and how you figured it out.
Q: All whole numbers from 1 to 2006 are written on on a black board. Johnny underlines all numbers divisible by 2. Sara underlines all numbers divisible by 3. Rudy underlines all numbers divisible by 4.
How many numbers are underlined exactly twice?
Post your answer and how you figured it out.
Q: All whole numbers from 1 to 2006 are written on on a black board. Johnny underlines all numbers divisible by 2. Sara underlines all numbers divisible by 3. Rudy underlines all numbers divisible by 4.
How many numbers are underlined exactly twice?