Math Facts Websites
This website lets you choose between addition, subtraction, multiplication, or division. You can have 10, 20, 0r 30 questions in your quiz. Time options range from 5 seconds per question to unlimited time.
I took the Post-Test on this website which covered it all 1-10 times tables. There were 40 questions. It told me the total time it took me to complete it as well as my score and which ones I got right and wrong. This option has a large onscreen key pad for answering which would be great for a touch screen.
This option lets you set it to a one minute time limit so you can challenge your students to answer as many as they can in the one minute. If you are trying to get your students to complete 25 questions in one minute this might be your best option. Students can even email you their results straight from the website.