KS2 Primary Maths Age 13-17 - Calculations: Word Problems - Explained

The video tutorial discusses a math problem where Dev thinks of a number, multiplies it by four, and rounds the result to the nearest ten, resulting in 50. The task is to find all possible starting numbers. The tutorial explores numbers that round to 50, identifies those divisible by four, and explains the scoring system for correct answers. It concludes with a reflection on the problem-solving process.

What is the initial step in solving the problem where Dev multiplies a number by four and rounds it to the nearest ten?

• Multiply the number by 10

• Identify numbers that round to 50

• Divide the number by 4

• Add 10 to the number

Which of the following numbers rounds to 50?

• 60

• 56

• 48

• 44

What is the significance of the number 48 in the context of the problem?

• It is divisible by 4 and rounds to 50

• It is a number that rounds to 60

• It is the number Dev thought of

• It is the final answer

How many marks can a student earn for identifying both correct starting numbers?

• One mark

• Two marks

• Three marks

• Four marks

Which pair of numbers should be identified to earn full marks?

• 10 and 11

• 14 and 15

• 12 and 13

• 16 and 17