Jonathan is studying for his exams. He studies for 1 hour on the first day and then adds an extra hour each day. How many hours will Jonathan have studied by the end of the tenth day?

Answer 1

On the first day, Jonathan studied for 1 hour.
On the second day, he studied for 1 + 1 = <<1+1=2>>2 hours.
On the third day, he studied for 2 + 1 = <<2+1=3>>3 hours.
On the fourth day, he studied for 3 + 1 = <<3+1=4>>4 hours.
On the fifth day, he studied for 4 + 1 = <<4+1=5>>5 hours.
On the sixth day, he studied for 5 + 1 = <<5+1=6>>6 hours.
On the seventh day, he studied for 6 + 1 = <<6+1=7>>7 hours.
On the eighth day, he studied for 7 + 1 = <<7+1=8>>8 hours.
On the ninth day, he studied for 8 + 1 = <<8+1=9>>9 hours.
On the tenth day, he studied for 9 + 1 = <<9+1=10>>10 hours.
In total, by the end of the tenth day, Jonathan would have studied for 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = <<1+2+3+4+5+6+7+8+9+10=55>>55 hours. Answer: \boxed{55}.