Grades 11-12 Video Solutions 2012-2012_11-12

Video Transcription

Video Summary

The problem involves a list of five numbers with specific multiplication conditions. The sequence has 2 as the first number and 12 as the last. The first three numbers multiply to 30, requiring the second and third numbers to multiply to 15. For the middle three numbers multiplying to 90, with the first two contributing a product of 15, the third number must be 6. Finally, the last three numbers multiply to 360. Since 6 and 12 are known, the fifth number must be 5. Thus, the center number in the list is 5.

Keywords

number sequence

multiplication conditions

list problem

mathematical puzzle

sequence analysis