Question

Cayden has several screws on a scale, and the scale reads 80.955g. Cayden adds 11 more screw, and the scale reads 84.81g.

What is the mass of the last screw Cayden adds?

Answer 1

Find the difference of the two masses and then divide by 11 screws to find the mass of each screw, which gives you the answer.

84.81g - 80.955g = 3.855 / 11 = .35g per screw, which would also be the mass of the last screw.

Explanation: