It is nothing. But a quarter past ten is a quarter hour after ten: that is 10:15 in the morning or evening.
The word 'ten' is a noun, it doesn't have a past tense.
Held
lead / led / ledHe has led the team for ten years. (past participle)
Absolutely nothing of importance
it's fifteen past ten.
Not so sure about one qauter, but one quarter of six is 1.5
25
the past ten of think is
The word 'ten' is a noun, it doesn't have a past tense.
Quarter to 10.
The past tense for eat is ate.
40 minutes
Twenty minutes.
a quarter past ten is 'dix heures et quart' in French.
The past tense for eat is ate.
one forth is one qauter eg. one forth of 100 is 25.
Half past ten is 30 minutes after 10 o'clock. (10:30)