## What type of number is 25?

25 is the sum of the single-digit odd natural numbers 1, 3, 5, 7 and 9, the first five odd natural numbers. 25 is a centered octagonal number, a centered square number, and an automorphic number. 25 percent (%) is equal to 14. It is the smallest base 10 Friedman number as it can be expressed by its own digits: 52.

### Is radical 25 a natural number?

25 is a natural number, and since there is another natural number 5, such that 52 = 25, 25 is a perfect square. Since 25 is a natural number and the square root of 25 is a natural number (5), 25 is a perfect square.

#### Who invented number 2?

Hindu-Arabic numerals, set of 10 symbols—1, 2, 3, 4, 5, 6, 7, 8, 9, 0—that represent numbers in the decimal number system. They originated in India in the 6th or 7th century and were introduced to Europe through the writings of Middle Eastern mathematicians, especially al-Khwarizmi and al-Kindi, about the 12th century.

**What is the number six?**

6 is the smallest positive integer which is neither a square number nor a prime number. Six is the second smallest composite number; its proper divisors are 1, 2 and 3. Since six equals the sum of its proper divisors, six is the smallest perfect number, Granville number, and. -perfect number.

**Why do students hate exams?**

-They are biased in favor of individuals who are superior at memorization. -Exam writers make exams difficult on purpose. They intentionally attempt to trick the test taker so the least amount of people possible pass the exam. This creates a paradigm where students are encouraged to fail rather than to succeed.

## Are examinations killing education?

Examinations only help providing “degrees”. Though examinations never provide education yet they are important. The reason is simple; examinations serve as the platform where we get an opportunity to showcase our talent. Our whole year’s hard work is revised through exams.

### Who first invented numbers?

Several civilisations developed positional notation independently, including the Babylonians, the Chinese and the Aztecs. By the 7th Century, Indian mathematicians had perfected a decimal (or base ten) positional system, which could represent any number with only ten unique symbols.

#### Why is number 2 special?

Two is the smallest prime number, and the only even prime number (for this reason it is sometimes called “the oddest prime”). Two and three are the only two consecutive prime numbers. 2 is the first Sophie Germain prime, the first factorial prime, the first Lucas prime, and the first Ramanujan prime.