Everyone knows their 2s, 5s, and 10s. But when a teacher asks, "What is 15 times 8?" even confident students pause to count up. That is exactly why the 15 times table trick keeps going viral on Facebook Reels and TikTok — it turns the entire multiplication table of 15 into a pattern so simple, you can rebuild it from memory in seconds.
In this post, you will learn the exact shortcut, see the full table of 15 laid out clearly, and pick up two bonus methods that make every multiple of 15 feel effortless. Whether you are a student sharpening your multiplication facts, a parent helping with homework, or a teacher looking for a pattern-based trick to share, this one is a keeper.
The 15 Times Table at a Glance
Here is the complete table of 15 (15 × 1 through 15 × 10):
| Multiplication | Answer |
| 15 × 1 | 15 |
| 15 × 2 | 30 |
| 15 × 3 | 45 |
| 15 × 4 | 60 |
| 15 × 5 | 75 |
| 15 × 6 | 90 |
| 15 × 7 | 105 |
| 15 × 8 | 120 |
| 15 × 9 | 135 |
| 15 × 10 | 150 |
Ten numbers that look like they need memorizing — but actually hide two dead-simple patterns. Let's reveal them.
The Trick: Watch the Last Digit and the Tens Digits
The multiplication shortcut trick behind the viral video works because of two hidden patterns inside the 15 times table .
Step 1 — The ones digit alternates 5, 0, 5, 0.Look at the last digit of every answer: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150. Every multiple of 15 ends in either 5 (when you multiply by an odd number) or 0 (when you multiply by an even number) . There is no exception — ever.
Step 2 — The tens digits follow a paired odd-even rhythm.Now read the tens values: 1, 3, then 4, 6, then 7, 9, then 10, 12, then 13, 15. The pattern is two odd numbers, then two even numbers, stepping up by 2 each time. Once you see "odd, odd, even, even, odd, odd..." you can write the whole front half of every answer automatically.
Put the two patterns together and the table rebuilds itself:
Tens Pattern (odd, odd, even, even) | Ones Pattern (5, 0, 5, 0) | Answer |
1 | 5 | 15 |
3 | 0 | 30 |
4 | 5 | 45 |
6 | 0 | 60 |
7 | 5 | 75 |
9 | 0 | 90 |
10 | 5 | 105 |
12 | 0 | 120 |
13 | 5 | 135 |
15 | 0 | 150 |
Say it out loud once — "15, 30, 45, 60..." — and the rhythm makes it stick. Most kids memorize the whole table in under a minute once they hear the beat.
Bonus Trick: Multiply by 10, Then Add Half
If patterns are not your thing, here is the fastest mental math method — and it works for any number times 15.
15 × n = (10 × n) + half of (10 × n)
For example, 15 × 6: first do 6 × 10 = 60, then add half of 60 (which is 30). 60 + 30 = 90. And 15 × 8: 80 + 40 = 120. Multiplying by 10 is instant, and halving is easy, so this trick scales all the way up — 15 × 24 becomes 240 + 120 = 360 .
This works because 15 is just 10 + 5, and multiplying by 5 is the same as multiplying by 10 and halving. It is the distributive property of multiplication, disguised as a shortcut.
Bonus Trick: The Repeated-Addition Rhythm
For younger learners who are just discovering multiplication, the classic method is repeated addition of 15: 15 + 15 = 30, 30 + 15 = 45, 45 + 15 = 60, and so on . Skip-counting by 15s (15, 30, 45, 60, 75, 90...) is how many U.S. elementary teachers introduce the table, and it builds the number-sense rhythm that the pattern trick above takes further.
Why the 15 Times Table Is Worth Learning
In the United States, multiplication fluency is a core standard expected by the end of fourth grade, and it underpins everything students do later — fractions, long division, area problems, and percentages. The 15 times table has a few real-world superpowers of its own:
Quick tips and percentages. A 15% tip is the classic restaurant standard, and knowing your 15s makes it instant: a $60 bill means a $9 tip (15 × 6 = 90, divided by 10). The same trick extends to 15% sales tax and discounts.
Speed on timed tests. On quizzes and standardized tests like the SAT and ACT, recognizing multiples of 15 (which appear constantly in factor and divisibility questions) saves precious seconds on small calculations, leaving more time for harder problems.
Confidence with the "hard" tables. Once students see that 15, 12, and 13 are all just patterns rather than brute-force memorization, math anxiety drops and mental math confidence rises.
Everyday money math. Prices in $15 increments — subscriptions, meal deals, unit pricing at the store — become instantly calculable in your head.
How to Practice the 15 Times Table Trick
Reading the trick once is not enough — run through it a few times and it locks in for good:
1.Skip-count by 15s out loud: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150.
2.Spot-check the ones digits: every answer must end in 5 or 0 — if it does not, something is wrong.
3.Test the "×10 plus half" method on three random numbers until it feels automatic.
4.Quiz yourself in pairs — ask a friend or child random questions like "15 × 7?" until the answers come instantly.
Two or three five-minute rounds is usually all it takes. That is the beauty of the 15 times table trick: it replaces memorizing ten numbers with remembering one rhythm.
Frequently Asked Questions
What is the trick to learn the table of 15?
The easiest trick is noticing that every answer ends in 5 or 0, alternating 5, 0, 5, 0, while the tens digits follow a paired rhythm of two odd numbers then two even numbers (1, 3, 4, 6, 7, 9, 10, 12, 13, 15) .
Can you really learn the 15 times table in seconds?
Yes — once you understand the alternating 5-0 pattern and the odd-even tens rhythm, reconstructing the full table takes seconds. Building true recall takes a few quick practice rounds.
What is 15 × 15?
Using the pattern (or 15 × 10 = 150, plus half of 150 = 75), 15 × 15 = 225.
Why do all multiples of 15 end in 0 or 5?
Because 15 is a multiple of 5, and every multiple of 5 ends in 0 (when multiplied by an even number) or 5 (when multiplied by an odd number) .
Is this trick good for kids in elementary school?
Absolutely. It works especially well for students in grades 3–6 mastering multiplication facts, and the skip-counting rhythm version is a favorite among U.S. teachers introducing times tables.
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