as many as he/she can, or as many as you teach her/him
5
a fifteen year old should be able to do atleast 110 sit ups in two minutes.
100
10
A 5-year-old should be able to count up to at least 20, but many children can count higher with practice and support from adults.
all five do it
Any where between 25-100.
10-30
A 12 year old should be able to do around 25 pushups in 30 seconds. This is a reasonable answer. Hope I helped you!
How many sit ups should a 12 year old be able to do
At least a year