How the WTS speculates, "The Bible does not say
The Bible does not say how long it took Noah to build the ark, but it seems that he spent several decades building it.
The Bible does not say, and traditions about their number vary. According to the Encyclopedia Britannica, “Eastern tradition sets the number of Magi at 12, but Western tradition sets their number at three, probably based on the three gifts of ‘gold, frankincense, and myrrh’ (Matthew 2:11) presented to the infant.”
The Bible does not say, but here are some possible ways.
The Bible does not say why he left, but the apostle Paul evidently viewed Mark’s action as irresponsible. Paul might have had questions about Mark’s dependability.
How many thousands had become believers? The Bible does not say, but even by the end of the first century, the number of believers must have been far fewer than 144,000.
The Bible does not say, but the way events unfolded suggests that consideration for young Samuel was an important factor.