**6.**A famous irrational number that is related to Biology.**7.**numbers you can multiply together to get another number: Example: 2 and 3 are _______ of 6, because 2 × 3 = 6.**8.**Natural numbers along with zero is called ________.**9.**A part of a whole.**11.**a number that can be expressed in the form a + bi, where a and b are real numbers and i is the imaginary unit, that satisfies the equation i2 = −1.**12.**What type of number is the square root of 250?**15.**__________ are formed by multiplying a digit by itself three times.**16.**A decimal with a finite number of digits.**17.**Negative numbers along with whole numbers is called__________ .**18.**The branch of mathematics dealing with the properties and manipulation of numbers.**19.**a positive integer that has at least one positive divisor other than one or the number itself.

**1.**What does the letter 'R' represents in math.**2.**What type of number is the square root of 296?**3.**120,240,360,480,.... are the ________ of 120.**4.**A decimal with infinite number of digits.**5.**The greatest all-round mathematician of all time.**10.**A complex number of the form w xi yj zk, where w, x, y, z are real numbers and i, j, k are imaginary units that satisfy certain conditions.**13.**a set of numbers that start from 1 and then goes on .....**14.**the product of a number multiplied by itself, e.g. 1, 4, 9, 16.**20.**Natural numbers greater than 1 that has no positive divisors other than 1 and itself are called _________ .