Number related words

3. to make or become four times as great
4. causing difficulty; hard to do or deal with.
5. is a strong, regular, repeated pattern of movement or sound.
7. any three parts in a union
9. the same as another
11. a country that is part of the United Kingdom
14. a combination group or series of three
16. a sequence of notes or chords closing a musical phrase
18. a series of eight notes
19. remaining the same in all cases; the distinctive clothing worn by members of the same organization or by children attending certain schools.

1. a house that has been divided into two separate units for two different families or groups.
2. four-quarters of a circle
6. an injury appearing as an area of discolored skin on the body
8. a group of three related things
9. a plan or drawing produced to show the look and function or workings of a building, garment, or other object before it is built or made.
10. is a vehicle that has pedals like a bicycle but only one wheel and no handle bars
12. a musical composition for four instruments or voices
13. is a vehicle composed of two wheels held in a frame one behind the other, propelled by pedals and steered with handlebars attached to the front wheel.
15. an outing that involves taking a packed meal to be eaten outdoors.
17. the first month of the year