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last 3 solved tasks
Look at the series (31, 124, 868, 19096, ?), determine the pattern, and find the value of the next number!
If 9c2cb - 6b26b = 32a1a find number abc. Multiple solutions may exist.
If 8ca38 - bab3b = 28103 find number abc. Multiple solutions may exist.

Dry-cell patent

In 1886, German scientist, Dr. Carl Gassner, was issued a German patent (No. 37,758) for the first "dry" cell, which used zinc as its primary ingredient. He encased the cell chemicals in a sealed zinc container. Gassner's battery was much like the carbon-zinc, general-purpose batteries on the market today. Gassner also patented his invention in Austria, Belgium, England, France and Hungary in the same year. A U.S. patent was issued to Gassner in 1887 (No. 373,064) on 15 Nov 1887. In America, by 1896, the Nation Carbide Company, later Union Carbide and Eveready, produced the first consumer dry cell battery. Two years later, the company made the first D cell. Combined with the invention of incandescent light bulbs, portable electric lights became common.«[Image: The six-inch, 1.5 volt Columbia Dry Cell marketed by NCC in 1896.]

A Bunny Story

Once upon a time there was a man who was peacefully driving down a windy road. Suddenly, a bunny skipped across the road and the man couldn't stop. He hit the bunny head on. The man quickly jumped out of his car to check the scene. There, lying lifeless in the middle of the road, was the Easter Bunny. The man cried out, "Oh no! I have committed a terrible crime! I have run over the Easter Bunny!" The man started sobbing quite hard and then he heard another car approaching. It was a woman in a red convertible. The woman stopped and asked what the problem was.The man explained, "I have done something horribly sad. I have run over the Easter Bunny. Now there will be no one to deliver eggs on Easter, and it's all my fault." The woman ran back to her car. A moment later, she came back carrying a spray bottle. She ran over to the motionless bunny and sprayed it. The bunny immediately sprang up, ran into the woods, stopped, and waved back at the man and woman. Then it ran another 10 feet, stopped, and waved. It then ran another 10 feet, stopped, and waved again. It did this over and over and over again until the man and the woman could no longer see the bunny. Once out of sight, the man exclaimed, "What is that stuff in that bottle?" The woman replied, "It's harespray. It revitalizes hare and adds permanent wave."
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