Problem Solving with Ratios and LCM

The video covers sixth-grade mathematics focusing on common multiples and least common multiples (LCM). It includes problems involving blinking lights, multiples of numbers, packaging items, and geometry on a coordinate plane. Additionally, it discusses calculating percentages for fundraising goals.

If a green light blinks every 4 seconds and a yellow light blinks every 5 seconds, when will they blink together?

• 10 seconds

• 15 seconds

• 25 seconds

• 20 seconds

A red light blinks every 12 seconds and a blue light every 9 seconds. When will they blink at the same time?

• 18 seconds

• 36 seconds

• 48 seconds

• 24 seconds

What is the least common multiple of 10 and 15?

• 25

• 30

• 35

• 20

How many packages of cups and napkins are needed to have the same number of each if cups come in packs of 8 and napkins in packs of 12?

• 2 packages of each

• 2 packages of cups and 3 of napkins

• 3 packages of each

• 3 packages of cups and 2 of napkins

How many sets of cups and napkins can be made if you have 24 of each?

• 30 sets

• 24 sets

• 18 sets

• 12 sets

If a rectangle is drawn on a coordinate plane with points A(-6, 9) and B(5, 9), what could be the coordinates of point C?

• (-6, 3)

• (5, 3)

• (5, 9)

• (-6, 9)

A school has raised 20% of its $2,500 goal. How much money have they raised?

• $250

• $500

• $750

• $1,000

If the school raises 175% of its $2,500 goal, how much will the music program receive?

• $4,375

• $3,750

• $4,000

• $4,500