##### Across

**4.**Diagram representing a system of connections**5.**The highest power of a variable**6.**Can be expressed in the form p/q where q is not equal to zero**9.**A self - contained step by step set of operations to be performed**11.**The smallest positive number that is a multiple of two or more numbers**13.**Equations on the graph have only one solution**16.**A whole number that can be divisible by more numbers other than 1 or itself**19.**A real number that cannot be expressed as a ratio of integers**20.**A whole number that can be positive , negtive or zero

##### Down

**1.**Numbers which when multiplied gives the original number**2.**The result of multiplying two numbers**3.**A decimal with finite number of digits**7.**A written statement indicating the equality of two expressions**8.**A whole number that is divisible only by 1 or itself**10.**The largest common factor of two or more numbers**12.**A positive integer that is equal to the sum of its positive divisors**14.**Equations on the graph have infinitly many solutions**15.**A proved statement used for proving other statements**17.**An expression consisting of variables and coefficents that involves various operations**18.**Type of graph where both the sides are symmetrical