What is Guess and Check, Same Difference & Remainder Concept? by John Yeo | Jul 20, 2016 | Uncategorized | 0 comments For P4/5/6, Here are 3 concepts that will benefit your child. Check out these concepts. 1. Guess and check 2. Same difference 3. Remainder Now, test your child if he can solve these 4 common questions. Click here to access worksheet 1.