Answer:
They met on Sunday for the first time.
Step-by-step explanation:
This can be found out by taking the LCM
The factors of 6 = 1*2*3
The factors of 4= 1*2*2
LCM = 2*2*3= 12
They both will meet on the 12 day for the second time.
If Thursday is the 12th day then counting backwards , they met on Sunday for the first time.