Speech Difficulties in Down Syndrome. Down syndrome (DS) is an incurable genetic disorder that has a profound impact upon a personâs physical, mental, and social development. Children with DS have anatomical and physiological differences in the mouth and throat region that affect feeding, swallowing, and oral motor skills.
1 A gross refers to a group of 144 items (a dozen dozen or a square dozen).  A great gross refers to a group of 1728 items (a dozen gross or a cubic dozen).
Quick Answer. There are 15 zeros following the one in 1 quadrillion. There are three zeros per every thousand and six zeros per every million. A quadrillion is a thousand trillion, which means it has three zeros for the thousand plus 12 zeros for the trillion for a total of 15. Continue Reading.