Across
- 2. numbers: pairs of numbers for which the sum of the divisors of one number equals the other number, e.g. 220 and 284, 1184 and 1210
- 5. equation: a combination of numbers and letters equivalent to a sentence in language, e.g. y = x2 + 3x - 4
Down
- 1. a step by step procedure by which an operation can be carried out
- 3. algebra the area of modern mathematics that considers algebraic structures to be sets with operations defined on them, and extends algebraic concepts usually associated with the real number system to other more general systems, such as groups, rings, fields, modules and vector spaces
- 4. a branch of mathematics that uses symbols or letters to represent variables, values or numbers, which can then be used to express operations and relationships and to solve equations