Number Trivia

Can you find out which number multiplied by itself will give the output as 12345678987654321?




Similar Riddles

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

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'Why are you standing on that chair in music class ?'.

what did student replied ?

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Can you find that number?

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When did John make this statement?

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Find The Odd One Out

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3. TRAP
4. DRAW
5. BACK

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In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Scratch the head

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Which tank will fill first?

Fill The Tank

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Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

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The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

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I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

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Challenging

There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.