The sum of three consecutive numbers is 405. What is the
3rd number?

Found this off of google, "What three consecutive integers have a sum of 405? Which means that the first number is 134, the second number is 134 + 1 and the third number is 134 + 2. Therefore, three consecutive integers that add up to 405 are 134, 135, and 136."

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.