Prime Numbers
Which number is the only even prime number?
2
Which fraction is bigger?
1/2 or 1/3
1/2
Name any multiple of 2.
any number multiple of 2, like 2, 4, 6, 8, ...
How do you call the perimeter of a circle?
Circunference
Which number is bigger?
0.06 or 0.71
0.71
Is 1 a prime number? Justify.
No, because it only has 1 divisor.
1/5 + 3/5
4/5
What does the rule for multiple of 3 tell us?
That the digits added together must add 3, 6 or 9.
How do we call the part of the circle that starts at the center and touches one part of the circle?
Radius
12.4 + 3.7
16.1
Name the first 5 prime numbers?
2, 3, 5, 7, 11
2/9 + 2/3
8/9 or 24/27
What do multiples of 5 have in common?
They end in 0 or 5
How do we call the part of the circle that cuts it in half?
Diameter
104.2 - 4.6
99.6
Name a number bigger than 50 that is a prime number.
Multiple examples...
How can we simplify 14/28?
1/2
How do we call number that only have 2 divisors?
Prime Numbers.
What's the formula of the circunference?
pi x diameter
2.5 x 28
70
Is 393 a prime number? Justify.
No, because it has 3 as divisor.
1 divided by 1/9
9
The numbers that are multiples of prime numbers are called...
Factors.
What's the formula of the area
pi x radius squared
How do we call the decimals numbers that never end?
Irrational