Caleb made a stack of popcorn balls on a table. He placed sixteen balls on the table, then added three more layers on top of them. Each layer had four fewer balls than the previous layer. How many popcorn balls in all were in the stack?

He never found out

Step-by-step explanation:

his mom slapped him for making popcorn ball towers instead of doing productive things.

b i think

step-by-step explanation:

not really sure

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )