One number exceeds another by 1. the sum of the numbers is 21. what are the numbers

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square