Godan verb with 'ru' ending, Transitive verb
to find a clear solution; to come to a clean decision; to give a clear explanation; to reason out; to conclude; to be pragmatic; to be practical
90の約数のうち、9でわり切れない数は何個あるでしょうか。Among the divisors of 90, how many numbers are not divisible by 9? to divide exactly (without remainder); to divide evenly
Also written 割切る【わりきる】