unsolvable

"The not of the student's attendance record meant they were absent. "

"He is a student of life."

"The carpenter used a long board to build the new bookshelf. "

"The teacher deemed Sarah's essay to be excellent and gave her an A. "

"Often used to imply membership of a large class."

"The math problem was provably incorrect because the student arrived at a wrong answer, and the teacher was able to demonstrate step-by-step where the error occurred. "

"My younger brother counted the evens in his math homework. "

"The farmer's math of the hay field was impressive—he collected a large amount. "

"It looks weaker and weaker, the more I think about it."

"The leaky faucet in the kitchen is a problem that needs fixing. "

"He is a student of life."

"My dog might not be the smartest in terms of tricks, but he always knows when I'm sad and comforts me. "