Word Problems: Multiples

The video tutorial guides students through solving a math problem where Ali chooses a whole number that, when multiplied by 4, results in a value less than 100, and when multiplied by 5, results in a value greater than 100. The teacher explains the process of finding such numbers, starting with 21, and confirms it meets the criteria. Other possible numbers like 22, 23, and 24 are also discussed. The tutorial emphasizes understanding the problem and practicing similar questions to improve speed and accuracy.

What is the condition for Ali's number when multiplied by 4?

• The result is less than 100.

• The result is exactly 100.

• The result is equal to 25.

• The result is greater than 100.

Which number, when multiplied by 5, gives a result greater than 100?

• 18

• 21

• 19

• 20

What is the result when 21 is multiplied by 4?

• 125

• 105

• 100

• 84

Which of the following numbers could Ali have started with?

• 26

• 19

• 21

• 25

Why is it important to write only one number in the answer box?

• To get more marks.

• To confuse the marker.

• To list all possible answers.

• To show understanding of the question.