Weekly Logic Puzzle February 13 2014, 0 Comments

Luminous Learning math riddles for elementary school special education students.

Last Week's Puzzle

A certain whole number is evenly divisible by 3. It is also divisible by 5 and 4. What is the smallest number that fits these conditions? Can you find a number larger than 100 that is divisible by 3, 4, and 5?

Answer: The first number that is divisible by 3, 4, and 5 is 60. One way to look at a puzzle like this is to multiply the numbers together to have a beginning point: 3 × 3 × 4 × 5 = 60. A quick look at the factors of 60 shows no other number smaller. So any multiple of 60 (going higher) would also fit these parameters: 120, 180, 240, 300 .

This Week's Puzzle

Can you place the fractions in order from least to greatest? 

                   3/10 , 4/9 , 1/4 , 3/5 , 14/17 , 1/5

*Hint: 1/5 is the smallest

 A new puzzle is posted weekly. Post your guesses below and check back next week to find out the answer!