Five numbers have an average of 16. if the first four numbers have a sum of 68, what is the fifth number

Find sum of 5 numbers:

Average of 5 numbers = 16

Sum of 5 numbers = 16 x 5 = 80

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Sum of 4 numbers = 68 (Given)

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Find 5th number:

5th number = 80 - 68 = 12

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The fifth number is 12

last one.

step-by-step explanation:

last one.

generally speaking, the others follow some sort of pattern that correlates to either linear (looks like a straight line) or sinusoidal (looks like an s).

the last one is just a random cloud of points that doesn't correlate to any particular known order.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!