Quant Numbers and Properties 2 Flashcards
Simple rule to determine if a number is divisible by 2
it’s even
Simple rule to determine if a number is divisible by 3
its digits add up to a multiple of 3
Simple rule to determine if a number is divisible by 4
it’s last two digits are divisible by 4
Simple rule to determine if a number is divisible by 5
last digit is a 0 or a 5
Simple rule to determine if a number is divisible by 6
is even AND digits add up to multiple of 3
Simple rule to determine if a number is divisible by 9
digits add up to a multiple of 9
Simple rule to determine if a number is divisible by 10
last digit is zero
Simple rule to determine if a number is divisible by 12
digits add up to multiple of 3 AND last two digits are divisible by 4
Is 1 a prime number?
no
list the simple digit primes
2,3,5,7
what is the only even prime number
2
Greatest common factor
greatest positive factor they have in common
least common multiple
the least integer that is a multiple of both a and b
is zero an integer?
yes
is zero even?
yes
is zero a prime number?
no
how do you write a negative exponent?
as a reciprocal expression (remove negative and place over 1)
2^2
4
3^2
9
4^2
16
5^2
25
6^2
36
7^2
49
8^2
63
9^2
81
10^2
100
11^2
121
12^2
144
13^2
169
14^2
196
15^2
225
