Is a real number?

real number, in mathematics, a quantity that can be expressed as an infinite decimal expansion. The real numbers include the positive and negative integers and fractions (or rational numbers) and also the irrational numbers.

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Then, how many 4x4 magic squares are there?

Unlike the 3x3 square there is not just one conclusion for the distribution of the numbers 1 to 16 in a 4x4 square. Fact: There are 880 magic squares, counting the symmetric ones only once. Can an integer be? An integer includes whole numbers and negative whole numbers. Integers can be positive, negative, or zero. For example: 1, -1, 0, 101 and -101. There are an infinite number of integers.

And another question, why is ramanujan great?

An intuitive mathematical genius, Ramanujan's discoveries have influenced several areas of mathematics, but he is probably most famous for his contributions to number theory and infinite series, among them fascinating formulas ( pdf ) that can be used to calculate digits of pi in unusual ways. What is Ramanujan constant? In mathematics, the Ramanujan?Soldner constant (also called the Soldner constant) is a mathematical constant defined as the unique positive zero of the logarithmic integral function. It is named after Srinivasa Ramanujan and Johann Georg von Soldner.

What is a sad number?

The numbers for which the process of summing up of the squares of its digits ends in 1 are happy numbers. On the other hand, numbers that don't end in 1 are called unhappy or sad numbers. Here, the number 36 loops endlessly in a cycle which doesn't end in 1. Therefore 36 is an unhappy or sad number. How can you tell someone's age without asking? Here are 15 ways to find out how old your date really is without actually asking: Stalk him on social media. Social media is always a go-to. Ask mutual friends. Check LinkedIn. Google him. Search public records and data. Analyze his name. Bring up technology. Discuss school memories.