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ভাস্কৰ জ্যোতি

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MATH PUZZLE: Can you replace the question mark with a number?
Remove 5 letters from this sequence (KOCAMOEIORA) to reveal a familiar English word.
Remove 5 letters from this sequence (UONNECJESHTSARYX) to reveal a familiar English word.

Leaded gasoline

In 1921, tetraethyl lead was first given a laboratory test as an anti-knock additive to gasoline fuel. The knock in the one-cylinder laboratory engine was utterly silenced. Even at a strength of only 2-3g grams per gallon (1000 to 1 dilution), it had a remarkable ability to quiet the relentless knocking. This invention of Thomas Midgley, Jr., of the General Motors Research Laboratories, located in Dayton, Ohio, was first put on public sale as ethyl gasoline in the same city on 2 Feb 1923. This invention of leaded gasoline came after seven years of testing at least 33,000 compounds. Previously, on hard acceleration, an engine sometimes made knocking, popping or crackling sounds, which sapped power and could damage the engine.

A little girl asked her mom...

A little girl asked her mom, "Mom, may I take the dog for a walk around the block?"
Her mom says, "No, because the dog is in heat."
"What's that mean?" asked the child.
"Go ask your father. I think he's in the garage."
The little girl goes to the garage and says, "Dad, can I take Susie for a walk around the block. I asked mom but she said the dog was in heat and that should ask you."
Her dad said, "Bring Susie over here."
He took a rag, soaked it with gasoline, and scrubbed the dog's butt with it and said, "OK, you can go now but keep Susie on the leash and only go one time around the block."
The little girl left and returned a few minutes later with no dog on the leash.
Her dad said, "Where's Susie?"
The little girl said, "Susie ran out of gas about halfway down the block and there's another dog pushing her home."
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