The answer to the riddle "From what number can you take half and leave nothing?" is the number 8, because when either the top or bottom half of the digit is removed, the remaining half forms the number zero, or nothing.
Continue ReadingAnother visual number riddle involving the number zero is "Why is the number 9 like a peacock?" The answer is because it is nothing without its tail. If you remove the tail from a number 9, the remaining circle is a zero. Another visual number riddle is "What is the difference between 100 and 1,000?" The answer is zero, because 100 has two zeros and 1,000 has three.
Learn more about NumbersSome math trivia examples include these facts: The middle digit of a three-digit answer to the multiplication of any number by 11 is the sum of the other two digits, or 21 x 11 = 231, while 2 + 1 = 3. The sum of the digits of the result of multiplying a number by 9 is always 9; 2 x 9 = 18, while 1 + 8 = 9.
Full Answer >The reciprocal of a negative number is also a negative number because when the two numbers are multiplied the answer is 1. For example, the reciprocal of -6 is -1/6, and the product of these two numbers is -6 x (-1/6)= 1.
Full Answer >In reality there is no answer to the question: What is the highest number known to man? With the addition of 1, any number presented as the largest can be made obsolete. In the abstract, numbers stretch on to infinity with no end to how high they can go; however, the largest number that has a name in the English language is googleplex.
Full Answer >The answer to this ancient riddle is commonly accepted to be "your age," but in reality, there are a number of possible answers. Other things that rise but never come back down are hot air and helium.
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