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What number comes next?

Look at the series (17, 15, 11, 3, 6, 12, 5), determine the pattern, and find the value of the next number!

Correct answers: 132

The first user who solved this task is Djordje Timotijevic.

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The Wedding Ring

Daughter: My fiancé said I could have whatever I wanted to be inscribed on his wedding ring. What should I put?
Mother: Put what I put on your father's wedding ring.
Daughter: What does it say. I've never seen daddy with it off.
Mother: Yes. It's worked very well over the years. It says, 'Put it back on!'

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Benjamin Silliman Jr.

Died 14 Jan 1885 at age 68 (born 4 Dec 1816).American chemist whose report on the potential uses of crude-oil products gave impetus to plans for drilling the first producing oil well, near Titusville, Pa. Silliman separated the crude oil into its component parts, or its fractions, and observed the characteristics of each fraction. He determined by use of a photometer that distilled petroleum burned much brighter than all but the most expensive and least efficient fuels. He also noted its potential use as a lubricant; he found it capable of withstanding extremely high and low temperatures and able to keep its form after long use. Silliman concluded petroleum was “a raw material from which...they may manufacture a very valuable product.”His report marked petroleum as the answer to the illumination fuel crisis.

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