Squaring Numbers Ending in 5 with Simple Trick

Updated: December 31, 2025

|

Category: Advance Math, Math

Can You Solve This?
25 × 25 = ?

What if I told you that you could solve a big-looking multiplication question in your head—

without paper,
without long steps,
and in just a few seconds?

Let’s try one:

25 × 25 = ?

Looks tricky, right?
But here’s the exciting secret…

There is a smart and fun trick for squaring numbers ending with 5, and once you learn it, math will start feeling like magic!
This trick works every single time—and even young students can master it easily.

Curious to know how?
Let’s discover the trick together!

The Magic of Squaring Numbers Ending with 5

Whenever you see a number that ends in 5, such as:

15
25
35
45

…and you are asked to square it (that means multiplying the number by itself), don’t worry at all. You don’t need long multiplication.

You just need to remember two very easy steps.

Step 1: The Ending Is Always 25

Here’s the first secret:
👉 5 × 5 = 25
So, whenever you are squaring numbers ending with 5,
the answer will always end with 25.
No thinking needed.
This part is fixed and easy to remember.

Step 2: The Neighbor Number Trick (Very Easy!)

Now comes the fun and simple part.

Look at the number just before 5
Add 1 to that number
Multiply the two numbers together

That’s it!

👉 Think like this:
“Before 5 is 2… the next number is 3…
So I do 2 × 3.”

This number will come in front of 25.

Let’s Try It Together: 25 × 25

Number before 5 → 2
Next number → 3
Multiply → 2 × 3 = 6
Ending → 25

Put them together → 625

So, 25 × 25 = 625

See how easy squaring numbers ending with 5 can be?

One More Example: 45 × 45

Number before 5 → 4
Next number → 5
Multiply → 4 × 5 = 20
Ending → 25

Final Answer → 2025

You just solved a big problem using a smart trick!

Why This Trick Is Easy to Remember

25 always comes at the end
The front number comes from multiplying neighbors

Once you learn this, squaring numbers ending with 5 becomes fast, fun, and stress-free

🎥 Watch the Trick in Action!

Some students learn better by watching, and that’s great!

Watch it once, and then try the trick on your own.

Final Thought

Math is not about doing hard work—it’s about learning smart tricks.
Now you know a special trick that will help you forever.

Happy learning and happy squaring!

Want to spark your child’s interest in math and boost their skills? Moonpreneur’s online math curriculum stands out because it engages kids with hands-on lessons, helps them apply math in real-life situations, and makes learning math exciting!

You can opt for our Advanced Math or Vedic Math+Mental Math courses. Our Math Quiz for grades 3rd, 4th, 5th, and 6th helps in further exciting and engaging in mathematics with hands-on lessons.

Related Blog:

$Shivani Sharma$

Shivani Sharma

Shivani is a content writer passionate about making math engaging and accessible. With a background in educational technology and robotics, she simplifies complex concepts and shares effective SAT math strategies. Her work helps students tackle tough problems with confidence, making learning both practical and enjoyable.