Webinars SET B - Grade 3-4 - Sunday@3:15-4:15pm EST-Recording Webinar 7

Video Transcription

Video Summary

This Level 3–4 Math Kangaroo webinar focuses on logical reasoning: drawing conclusions only from given facts, eliminating impossible cases, and ensuring outcomes are guaranteed rather than assumed. After a quick warm-up subtraction problem, the instructor emphasizes careful reading, note-taking, and marking key information.<br /><br />Students solve several classic logic formats. They order boys by ice-cream amounts using inequality chains, then complete a picture-grid “Sudoku” by checking row/column constraints. A frogs-and-turtles problem is handled with ratios (frogs are three times turtles) and the condition that more than half of 10 rocks are occupied. A 6-digit code question is solved by testing answer choices and comparing sums of alternating positions, using maximum-digit checks to eliminate options.<br /><br />Next, a worded counting problem (“precisely 10 are not cows,” “precisely 8 are not cats”) is translated into exact counts, leading to the number of kangaroos. An age puzzle connects multiple relationships to find a great-grandmother’s age. A candy-bag problem uses the total sum 1–10 = 55, subtracting known totals to find the remaining boy’s candy count. Another age-order problem (involving twins and “older/younger” links) is solved via a number line or by assigning a convenient sample age.<br /><br />A final color-adjacency triangle puzzle demonstrates constraint propagation. The session ends with advice: logic problems often require rereading, connecting clues across sentences, and sometimes using information out of order, plus encouragement to review recordings and practice materials.

Keywords

Math Kangaroo Level 3-4

logical reasoning

constraint elimination

inequality chain ordering

picture-grid Sudoku

ratio word problem

frogs and turtles rocks puzzle

6-digit code alternating sum

complement counting (not cows/not cats)

age relationship puzzles