Divisibility
Assorted divisibility puzzles 15Counting multiples 18🔒Divisibility by 11 18🔒Divisibility by 3, 4 and 6 18🔒Divisibility by 7 and 13 10🔒Divisibility by 9 and 99 18🔒Largest divisors 18🔒Largest multiple below a bound 13🔒Missing digits for divisibility 18🔒Mixed divisibility conditions 18🔒Multiples with digit conditions 17🔒