For 3 & 5, 15 is the LCM, short for this
least common multiple
Oh, boy, you've got a problem now; you did this literally
open up a can of worms
A greater distance away
further
A U.S. representative's re-election bid
2 years
To satisfy one's thirst
(6)
quench
It's the cinematic term for the type of array seen here
matrix
When you sever a connection, like with your cable company, you do this, something that's also done just after birth
cut the cord
A prefix meaning "straight", it comes before "-dox" & "-pedist"
ortho-
The Commonwealth Games are held
4 years
Good place to hunt slate & marble
(6)
quarry
[DD]
4πr2 gives the surface area of one of these 3-dimensional shapes
sphere
[DD]
Danger! Danger! Beware of this animal in disguise
a wolf in sheep's clothing
To toss a ball out of a receiver's reach, or to toss out a monarch
overthrow
The same animal year returns in the Chinese calendar
12 years
[DD]
Leap or mechanics preceder
(7)
quantum
Equal to about 57.2958 degrees, it's the angular measurement made by wrapping half the diameter around a circle
a radian
To hide a problem is to "sweep it" here
Nelson Mandela fought this policy for decades (& triumphed)
apartheid
The appearance of the title Highland village in the musical "Brigadoon"
every 100 years
Where FBI agents train
(8)
Quantico
The domain is the set of values that can be input into a function; the set of possible outputs is called this expanse
range
If something is relatively easy to do or understand, then "It's not" this, Robert Goddard's field
rocket science
Named for a 1950s senator, it became synonymous with making unfair accusations to restrict dissent
McCarthyism
A jubilee year as recounted in the book of Leviticus in the Bible
every 50 years
The most typical of all
(14)
quintessential