Grade 4 problem

Arithmetic · Grade 4

There are two ribbons 84 and 126 centimeters long. Both must be cut without leaving any residue into identical pieces of the greatest possible length. What is the length of one segment?

Show hints
  1. Find the common divisor of two lengths.
  2. Choose the greatest common divisor of the numbers 84 and 126.
Show the answer and solution

Answer: 42

Both 84 and 126 are divisible by 42, giving two and three pieces. No longer common piece length is possible.

Report a problem with this question

Practice more problems

Next problem: There were 160 liters of water in the tank. Three-eighths of all water was used for irrigation. How many liters are left in the tank?