One Progression Minus Another
Difficulty: Hard · Topics: Discrete Mathematics, Sets, Counting
A=\x : 20<x≤ 181,\ x=4k+1,\ k∈mathbbN\
B=\x : 47≤ x<217,\ x=6k+1,\ k∈mathbbN\
How many elements does the set Asetminus B have?
Difficulty: Hard · Topics: Discrete Mathematics, Sets, Counting
A=\x : 20<x≤ 181,\ x=4k+1,\ k∈mathbbN\
B=\x : 47≤ x<217,\ x=6k+1,\ k∈mathbbN\
How many elements does the set Asetminus B have?