Number Theory
Greatest Common Divisor / Lowest Common Multiple
What is the common divisor of \( 33 \) and \( 55 \) except \(1\)?
Simplify\[\dfrac{2^2 \times 3}{2 \times 3 \times 5} .\]
What is the greatest common divisor of 35 and 91?
What is the gcd(A, B) if:
A = \( 6 \times 35, \) and
B = \( 8 \times 15? \)
Simplify \[\dfrac{15}{20}. \]
Details and assumptions:
- You may use the fact that \( 15= 3 \times 5\) and \( 20 = 4 \times 5\).