Pre-Final

Question 1

It is a branch of mathematics concerned with integers and their properties.

Answer 1

Number Theory

Question 2

Means dividing a number evenly.

Answer 2

Divisibility

Question 3

These are positive integers greater than 1 that cannot be divided by any number except themselves and 1.

Answer 3

Prime Numbers

Question 4

Procedures of writing prime numbers

Answer 4

o Write the numbers from 1 to 100 in 10 rows of 10.
o Cross off number 1 because all primes are greater than 1
o Number 2 is a prime, so we can keep it, but we need to cross off the multiples of 2.
o Number 3 is also a prime, so again, we keep it and cross off the multiples of 3.
o The next number left is 5 (because four has been crossed off), so we keep it and cross of
the multiples of this number.
o The final number left in the first row is number 7, so cross off its multiples.

Question 5

These are positive integers that are greater than 1 and are not prime.

Answer 5

Composite

Question 6

largest non-zero integer d that is a common divisor of all the given integers

Answer 6

Greatest Common Factor (GCF)

Question 7

It is the smallest integer that is a common multiple of all the given integers.

Answer 7

Least Common Multiple (LCM)

Question 8

A way of expressing a number as a product of its prime factors

Answer 8

Prime Factorization