📘 algebra, number theory, sequences

1. **Problem 1:** Find how many integers $M$ between 16 and 27 have an even number of factors. 2. **Step 1:** Recall that the number of factors of a number is even unless the numbe

1. Problem 9: Given two-digit number \(\overline{yx}\) with digits \(x\) (tens) and \(y\) (units). Equation: \(\frac{x}{0,y} + m = \frac{yx}{0,y}\). We interpret decimals as \(0,y