Question

Ines missed three questions on the test but answered 90% of the questions correctly. How many questions were on the test?

Answer 1

Since he answered 90% of the questions correctly, 10 percent were answered incorrectly. Therefore 3 problems is 10% of the whole test. Then the whole or 100% of the test is 100/10=10 times this amount or 3*10=30 questions.