Grades 3-4 Video Solutions 2018-Grades 3-4 Video Solutions 2018 part 3

Video Transcription

Video Summary

In the series of problems described, the solutions detail logical reasoning and step-by-step calculations:<br /><br />1. In the first puzzle, Baby Yuru finds his way through a sequence of increasing room numbers to exit at door D.<br />2. In the second problem, through weight balance analysis, it is determined that ball C weighs 30 grams.<br />3. For the third question, by observing how the band is fastened, a difference of 8 centimeters is calculated when comparing the longest and shortest fastening positions.<br />4. The fourth problem is a number-symbol matching task. The symbol 'I' is identified to represent number 3.<br />5. In the fifth problem, using visual matching, the mirrored image corresponds to option B.<br />6. The sixth question requires calculating the area of a large rectangle formed by squares. It's found to be 198, corresponding to option D.<br />7. For the seventh query, numbers 1 or 7 can be placed in the marked cell, hence option E.<br />8. Lastly, by reasoning backward for the dragon's heads problem, it is determined that the dragon initially had 9 heads.<br /><br />These solutions employ logical deduction and calculations to arrive at the correct answers.

Keywords

logical reasoning

step-by-step calculations

problem-solving

puzzles

deduction

mathematics