GCSE Secondary Maths Age 13-17 - Algebra: Algebra/Expression - Explained

The video tutorial explains a problem involving Dimitar and Pip, who both start with 20 sweets. Dimitar gives Pip X sweets, eats five of his own, and Pip eats half of her sweets. The tutorial guides through writing expressions for the remaining sweets each has, emphasizing careful step-by-step analysis to solve the problem. It concludes with an explanation of the marks allocation for solving the problem.

If Dimitar gives Pip X sweets, how does this affect the number of sweets each has?

• Both Dimitar and Pip lose X sweets

• Dimitar gains X sweets, Pip loses X sweets

• Dimitar loses X sweets, Pip gains X sweets

• Both Dimitar and Pip gain X sweets

After Dimitar eats 5 sweets, how many sweets does he have left?

• 20 + X

• 15 + X

• 15 - X

• 20 - X

What happens to Pip's sweets after she eats half of them?

• She has 10 sweets left

• She has 20 + X sweets left

• She has (20 + X) / 2 sweets left

• She has 5 sweets left

What is the expression for the number of sweets Dimitar has after all actions?

• 20 - X

• 15 - X

• 20 + X

• 15 + X

How many marks are allocated for deriving the final expressions for the number of sweets?

• 3 marks

• 4 marks

• 2 marks

• 1 mark