Find two consecutive odd integers such that 41 more than the lesser is four times the greater.

What kinds of numbers have an odd number of factors?

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

If sin(x) = 0 and cos(x) = 1, what is tan(x)?