Fill in the blanks.
• Difference between LCM of both the numbers on House-1 and HCF of both the numbers on House-2 is __P__.
• Total number of prime factors of the greatest number among the numbers on the houses is __Q__.
• Number of common factors of numbers on House-2 is __R__.
If x : y = 4 : 5, then (4x + 5y) : (5x - 2y) is equal ([a-z]+ )
A 41 : 10
B 4 : 5
C 16 : 25
D 3 : 10
([a-z] ) not needed