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In this segment, your students will watch a video that presents a math riddle: how to use two pencils to divide the numbers on a clock into three groups with equal sums. The video itself explains the riddle, so your role is to guide the discussion and help students see the math patterns.
Two videos are available:
Teacher’s Guide – Watch before class
A short prep video with instructions and tips for leading the activity.
Classroom video– Play in class
The main video for students helps them solve the math challenges in class.
The Clock segment can be viewed by all ages, however, the math level is for grades 3-6
Addition, division and logical grouping.
Teacher Note – Clock Solution:
This is the solution to the clock problem shown in the video. The numbers 1–12 add up to 78, and using 2 pencils, the clock can be divided into 3 sections so that each section sums to 26. There are multiple correct arrangements; the important point is that each section totals 26, which you can use to guide student discussion.
Please take a moment to share your thoughts on the show and the segments you used in class.
Write Review
Your Teacher Toolkit — Click the tabs below to get started.
In this segment, your students will watch a video that presents a math riddle: how to use two pencils to divide the numbers on a clock into three groups with equal sums. The video itself explains the riddle, so your role is to guide the discussion and help students see the math patterns.
Two videos are available:
Teacher’s Guide – Watch before class
A short prep video with instructions and tips for leading the activity.
Classroom video– Play in class
The main video for students helps them solve the math challenges in class.
The Clock segment can be viewed by all ages, however, the math level is for grades 3-6
Addition, division and logical grouping.
Teacher Note – Clock Solution:
This is the solution to the clock problem shown in the video. The numbers 1–12 add up to 78, and using 2 pencils, the clock can be divided into 3 sections so that each section sums to 26. There are multiple correct arrangements; the important point is that each section totals 26, which you can use to guide student discussion.
Please take a moment to share your thoughts on the show and the segments you used in class.
Write Review