number

An amount of something you can measure or count

A word or symbol that shows a number

A number that shows how many things there are, not their order, for example one, two, three

A word or number that tells how many things there are

A number that shows how much of something there is

To put your own needs before other people's

A clear top item on charts or rankings that is much more popular than others

Make someone face consequences they cannot avoid

To be likely to cause trouble for someone

To become red in the face when you feel embarrassed

The first and most important person or thing in a list

A set of numbers people use to call each other

Many people or things counted together

Someone or something that is second in order

A set of numbers people use to call someone by phone

Putting your own needs or interests before those of other people

A phone number you call by mistake

A number the United States gives to people to show who they are, pay taxes, and get government benefits

Numbers or letters on a car's number plate that identify the vehicle

A whole number you can split into two equal parts

A value that can be shown on a straight line, like 3, 1/2, or pi

A whole number greater than 1 that you can divide only by 1 and itself

A secret number that lets you access bank or phone accounts

A number that shows which page in a book or document

Doing long, complex calculations, often using a computer

A phone number to call for help in an emergency, for example the police or an ambulance

A device or program that produces numbers that do not follow a pattern

A unique number shown on a vehicle's license plate to identify it

A person who works with many numbers and can do difficult calculations using computers

A number with no fraction and no decimal, such as 0, 1, or -3

A way to write numbers using digits, like decimal or binary

Number of protons in an atom's center that shows its place in the periodic table

A computer data type for numbers with decimals, often approximate

A number for a mailbox at a post office where someone receives mail

A number with a real part and an imaginary part written as a + bi

A number of protons or neutrons that makes a nucleus especially stable

A number in the form a plus b i, where i is the square root of minus one

A number used for counting that starts at one and goes up

A person who has the same job in another company or country

A code you enter to activate software or an online service

A number that cannot be written as a fraction, for example π or √2

A number that can be written as a fraction like 3/4 or -1/2

A secret number you use to prove who you are and open accounts

A code of letters and numbers on a library book that shows where it is on the shelf

A number that shows how many things there are, not their order, for example one, two, three

A number in a list where each equals the sum of the two before, starting with 0 and 1

The total number of protons and neutrons in an atom's nucleus

A number that shows how things like prices change over time or between places

The British Prime Minister, their home at 10 Downing Street, or the main attacking player in football

A number that shows position in a list

A number that shows how many electrons an atom has lost or gained in compounds and ions

A number used to receive mail at a post office box

A number that is not a solution of any polynomial equation with rational coefficients

A count of repeating movements per metre of light or sound

The difference in number between matter particles and antimatter particles that stays the same when particles react

A way to write numbers using only 0 and 1

A number showing how hard a metal is by pressing a steel ball into it

A whole number greater than one that can be divided evenly by a number other than one and itself

An amount shown using two or more different units, like one hour and ten minutes

A number system using digits 0 to 9 that counts in tens

A way of writing numbers that uses twelve as its base and digits 0 to 11

A number that shows a United States bank's location and tells which bank it is

A number that solves a polynomial equation with rational coefficients

A radioactive metal made by shooting neutrons at plutonium in a lab

A colorless gas used in bright red signs and lights

A radioactive metal element called nobelium with atomic number 102 that scientists use only for research

A radioactive element called lawrencium that scientists make in a lab

An element called dubnium with symbol Db and atomic number 105

A man-made radioactive chemical element called rutherfordium with symbol Rf

A soft white metal found in rare earth minerals, used in special glass and camera lenses

A soft silvery metal called barium used in medicine and industry

A soft grey metal used in lighter flints and many industries

A soft metal called neodymium from the rare earths used in strong magnets and lasers

A soft yellow-white metal used in alloys and special glass

A soft silver metal from the rare earth group that is radioactive and has no stable forms

A rare earth metal with the symbol Eu

A silvery metal called samarium that is used in powerful magnets and electronics

A silvery-white chemical element used in magnets and medical imaging

A rare earth metal called holmium that helps make very strong magnets

A metal found in minerals and used in some lasers and glowing materials

A rare earth metal called erbium that is used in lasers

A colorless, odorless gas that makes up most of the air and is needed by living things

A soft silvery metal called ytterbium that has atomic number 70