1. A baker made 78 muffins in the morning. By the end of the day, he had sold 46 of them. The number of muffins left is ___.
2. A school has 489 students. If 257 students are boys, how many students are girls?
3. Solve for the missing number `y` in the equation $y + 42 = 99$. The value of `y` is ___.
4. A right triangle has two legs with lengths of 5 cm and 12 cm. What is the length of the hypotenuse?
5. What is the result when twenty-three is subtracted from eighty-five?
6. Solve for the value of $x$ in the equation $x + 23 = 58$. The value of $x$ is ___.
7. Which number for $n$ makes the following equation true? $41 + n = 79$
8. A number $b$ is added to 62 to get a total of 85. What is the number $b$? The number is ___.
9. Sara had 14 stickers. Her friend gave her some more, and now she has 49. How many stickers did her friend give her?
10. Find the missing number in the equation: $16 + w = 97$. The value of $w$ is ___.