This video tutorial addresses a GCSE-level question on histograms, focusing on measuring the lengths of leaves from a specific plant species. The tutorial explains how to calculate the area of histogram blocks to determine the number of leaves measuring 25mm or less and 60mm or more. The method involves counting squares and using basic arithmetic to find the solution. The video concludes with a summary of the calculations and a link to additional histogram problems.

What is the main topic discussed in this video?

• Line graphs

• Pie charts

• Histograms

• Bar charts

What does the histogram in the video represent?

• The age of plants

• The weight of fruits

• The lengths of leaves

• The heights of trees

How many leaves were measured to be 25 millimeters or less?

• 1242

• 60

• 42

• 105

What method is used to determine the number of leaves measuring 25 millimeters or less?

• Using a scale

• Measuring tape

• Counting squares

• Using a ruler

What is the area of the first block representing leaves measuring 25 millimeters or less?

• 30 square units

• 25 square units

• 20 square units

• 15 square units

How is the value of one square unit determined?

• By dividing the total area by the number of leaves

• By multiplying the total area by the number of leaves

• By adding the total area to the number of leaves

• By subtracting the total area from the number of leaves

What is the value of one square unit in terms of leaves?

• 3/5 of a leaf

• 1/2 of a leaf

• 1/3 of a leaf

• 1/4 of a leaf

How many leaves measure 60 millimeters or more?

• 63

• 42

• 105

• 1242

What is the final number of leaves calculated for those measuring 60 millimeters or more?

• 63

• 1242

• 42

• 105

What tool is suggested for verifying the calculations?

• Protractor

• Calculator

• Ruler

• Compass