Helen's Blog #4

Question 1:

1332:
12x111
3x4x3x37
3x2x2x3x37

2²x3²x37


Question 2:

gcd(240,840)

240:
24x10
3x8x2x5
3x4x2x2x5
3x2x2x2x2x5

240= 2^4x3x5

840:
84x10
4x21x2x5
2x2x3x7x2x5

840= 2³x3x5x7


GCD = 2³x3x5= 120 LCM= 2^4x3x5x7=1680


Question 3:


133 is not a prime because you can divide it by 19 and 7. 103 is a prime because it is only divisible by itself.


Question 4:


Divide by 2: R=1

Divide by 3: R=1

Divide by 5: R=0

Divide by 9: R=9


I kept dividing until I couldn't divide anymore.