question: Answer this question.

Which term describes any two colours which together produce white light?
answer: complementary
question: Answer this question.

What mathematical tabular system was invented in 1614 by John Napier that changes calculations of, for example, multiplication and finding square roots to addition and division respectively?
answer: logarithms
question: Answer this question.

Tennis - How many Wimbledon singles titles did Steffi Graf win?
answer:
7