01 · A high five, literally
Choca esos cinco.
Give me five.
Literally "crash those five" — the idiom that makes this badge's own name make sense.
andbefluent.com/spanish/number-ninja
Number Ninja
Count, say prices and ages, and catch numbers in fast speech — out loud.
Spanish numbers come in three shapes. 0–15 are single words you just learn: cero, uno, dos… catorce, quince. 16–29 fuse into one word: dieciséis, diecisiete, veintiuno, veintidós (the spelled-out diez y seis exists, but the one-word forms are standard). From 31 up they split with y: treinta y dos, cincuenta y cinco. Two things trip beginners: the teen/twenty sound-alikes (dieciséis vs veintiséis), and gender — un café not uno, and veintiún años before a masculine noun, veintiuna before a feminine one.
Below: the numbers lesson by lesson, the idioms locals build on them, the sound-alike traps — and a way to practise them at conversation speed, out loud, not on a worksheet.
The warm-up pack
The numbers Spanish speakers actually use — in idioms, prices and plans, not a times table.
01 · A high five, literally
Choca esos cinco.
Give me five.
Literally "crash those five" — the idiom that makes this badge's own name make sense.
02 · A perfect score
Sacarse un diez. Te saliste un diez.
To ace it. You nailed it, a perfect ten.
The compliment every student wants to hear, and the natural way to say you gave something your all.
03 · The unlucky day (not Friday)
Martes trece.
Tuesday the 13th.
In the Spanish-speaking world, Tuesday carries the bad luck — Friday the 13th means nothing here.
04 · A girl's biggest birthday
Mis quince años.
My fifteenth birthday.
The quinceañera — a milestone celebrated bigger than most weddings in many families.
05 · Pinning down a time
A las ocho en punto.
At eight o'clock sharp.
En punto is what turns a vague plan into a real commitment — use it whenever you actually mean it.
06 · Being broke, numerically
Estar en cero. Estar en la lona.
To be broke, starting from scratch. Flat broke.
Two ways numbers do double duty for money trouble — both understood as "I've got nothing left."
07 · No stress at all
Cero estrés.
Zero stress.
A number moonlighting as an attitude — say it about a plan and you're telling someone to relax.
08 · Money in your hand
Un billete de veinte.
A twenty (bill).
The natural way to describe cash by its number — swap veinte for any denomination you're holding.
09 · Age as a life stage (Mexico)
Estoy en mis veintes.
I'm in my twenties.
Numbers describing a whole decade of life, not just a birthday — a natural way to place yourself.
10 · Gender agreement that scales up
Veintiún años. Veintiuna.
Twenty-one years old (before a masculine noun). Twenty-one (feminine).
The same un/una rule from small numbers still applies once you get to twenty-one — it just compounds.
11 · Afternoon tea, not eleven o'clock (Chile)
Tomar once.
To have afternoon tea.
A Chilean cultural fingerprint — the number eleven moonlighting as a meal with nothing to do with the clock.
FLUENT
Finally, someone to talk to in Spanish.
Ten-minute spoken lessons. A teacher who answers back — and gently fixes what you got wrong.
First 10 lessons freeandbefluent.com/spanish/number-ninjaRegional Spanish
Textbooks teach one word. Locals use several — pick your region's and stay consistent.
Watch out
The part no drill site can do
Olivia
Your vocabulary teacher for this pack
No drills, no number grids to fill in. In the Number Ninja lessons, Olivia keeps numbers coming at real conversation speed: she quotes a price and you echo it back to confirm, she asks your age, she has you pin down a plan — a las ocho en punto — and pay with un billete de veinte. When a long one wobbles, you chunk it out loud — cincuenta… y… siete — until numbers stop needing translation.
Blank mid-sentence and nothing bad happens — she waits. That's the practice, without unnecessary judgement.
Finish the 5 lessons and Number Ninja is yours — earned, not given.
First 10 lessons free · 10-minute spoken lessons · your AI coaching team remembers you
Quick answers
Dieciséis, diecisiete, dieciocho, diecinueve — each one word. Alternate spellings like diez y seis exist, but the one-word forms are the standard everywhere in Latin America.
Before a masculine noun, uno shortens to un: un café. Feminine takes una: una cerveza, por favor. The same rule scales up — veintiún años, but veintiuna with a feminine noun.
Slow the front of the word down: dieci- = teens, veinti- = twenties. Practising them out loud as minimal pairs — and chunking longer numbers like cincuenta y siete segment by segment — is what makes them land in fast speech.
The unlucky day. In the Spanish-speaking world it's martes trece — Tuesday the 13th, not Friday. Numbers carry culture: los quince means a girl's quinceañera, and un diez is a perfect score.
To have afternoon tea — a Chilean cultural fingerprint that has nothing to do with 11 o'clock. In Colombia, estar a las once means having a mid-morning snack. Both are numbers doing double duty as meals.