The past tense for eat is ate.
Ten past ten, is another way of saying ten minutes past ten o'clock, it can be am (morning) or pm (evening).
the past ten of think is
it means ten minutes past 1 o'clock
The word 'ten' is a noun, it doesn't have a past tense.
It is nothing. But a quarter past ten is a quarter hour after ten: that is 10:15 in the morning or evening.
Quarter to 10.
40 minutes
Twenty minutes.
a quarter past ten is 'dix heures et quart' in French.
The past tense for eat is ate.
Half past ten is 30 minutes after 10 o'clock. (10:30)
Ten past ten on a clock face has the hands balanced symmetrically on either side of the 12. Other times would also do this: quarter-past nine, for example, or twenty past eight. But ten ten looks best for display.