Rules Flashcards
What is the product of three consecutive numbers?
A multiple of 6
What is the length of the diagonal of a square with side length r
r√2
What is the height of an equilateral triangle?
√3/2 x the base
(n+1)n is always…
Even
How can you find the number of factors which a number has?
Add one to the powers of the prime factors and times the values of the new powers
The powers of the prime factors of a square number are always…
Even
A number is divisible by 3 if…
The sum of the digits is divisible by 3
A number is divisible by 4 if…
The last two digits form a number that is divisible by 4
A number is divisible by 6 if…
It is divisible by both 2 and 3
A number is divisible by 7 if…
The sum of the second digit and three times the first gives a multiple of 7
A number is divisible by 9 if…
The sum of the digits is divisible by 9
A number is divisible by 8 if..
The number formed from the last three digits is divisible by 8.
