Q is a (semi-)readable variant. You can more or less directly translate K symbols to English words. Here's some code for PE question 1: K +/&~&/(!1000)!/:

Q is a (semi-)readable variant. You can more or less directly translate K symbols to English words. Here's some code for PE question 1: K +/&~&/(!1000)!/:3 5 Q sum where any not {(til x)mod y}[1000] each 3 5