BETWEEN 10 & 20
ABBREV.
NUMB WITH NUMBERS
___ OR ___
A LITTLE BODY ENGLISH
100

It's the smallest 2-digit prime number

11

100

Bright energy-efficient component: LED

Light Emitting Diode

100

One half minus one sixth equals this amount when reduced to its simplest fraction

One Third
100

The Scottish & Irish custom of guising, dressing in costume & getting rewards, was a predecessor of this activity

trick or treat
100

This expression for madly in love is 2 body parts & a preposition

head over heels

200

This number becomes palindromic when written with 3 letters in Roman numerals

19 (XIX)

200

On the clock in Denver:
MST

Mountain Standard Time

200

If the legs of a right triangle are 6 inches & 8 inches, this is the length of the hypotenuse

10 inches

200

This expression meaning "do as I say" ends with a multi-lane road

my or the highway

200

3-word way to wish a performer good luck

break a leg

300

When writing a haiku, you must use this many syllables

17 (5,7,5)

300

Let the games begin:
IOC

International Olympic Committee

300

There are this many spots total on 2 standard dice

42

300

If you don't want to reveal your secrets in this party game, you may have to do something risky

truth or dare

300

To deal with the consequences of your actions; hope the tune is at least catchy when you do

face the music

400

Georgia ratified this amendment into law December 6, 1865

13th Amendment

400

A regional alliance:
NATO

North Atlantic Treaty Organization

400

The sum of interior angles in a decagon (hint: -2)

1440

400

Succeed or fail is at the heart of this "watery" alliterative idiom

sink or swim

400

To be hit hard by something is to "take it on" this

the nose (or the chin)

500

Developed by chemist Willard Libby, this method named for an isotope is used to date fossils

Carbon-14 Dating

500

A care provider:
LPN

Licensed Practical Nurse

500

A 2 square foot rug cost 864 dollars, so it's this much per square inches

$3 per square inches

500

Robert Burns wrote, "Liberty's in every blow, let us" this, meaning succeed at all costs

do or die

500

Isaac Newton said he had seen further by "standing on" these

the shoulders of giants