Or search by topic
What is the largest number which, when divided into 1905, 2587, 3951, 7020 and 8725 in turn, leaves the same remainder each time?
Take any prime number greater than 3 , square it and subtract one. Working on the building blocks will help you to explain what is special about your results.
Can you find the area of a parallelogram defined by two vectors?
Watch the video to see how to sum the sequence. Can you adapt the method to sum other sequences?