I Will Read It Out Of Your Head With Just 4 Steps

Call it a Math Trick, Magic, or Anything You Like
But let’s play it first. Then I’ll show you how it works.

Let’s play.

You may decide to pick any number, preferable a number you can easily manipulate

Confirm that the last digit you have is a Seven

Try it again with any other number. It will still take you to the same point.

If you have Math-o-Phobia, you can stop here.
But if you want the explanation, let’s look into the mathematics of this "magic trick".

1. Think of any number - don’t tell me
2. Multiply it by 5
3. Multiply that result by 2
4. Subtract 3

Now look at your answer.
The last digit is 7, isn’t it?

HOW AND WHY IT WORKS

I look at it as managing numbers like a strategist.
Just making sure you are numerically pushed to a specific corner, regardless of where you started.

The Secret: No magic, just math.

Step 2 and 3 are the trap:
×5 then ×2 = ×10

Because 5 times 2 = 10

And here’s the rule: Anything ×10 MUST end in 0.
Look at this exampls
23 × 10 = 230
7 × 10 = 70
1042 × 10 = 10420

So after step 3, your number is secretly 10n. It ends in 0 no matter what n was.

Then step 4: 10n - 3
???0 - 3 = ...7

That’s it. I forced your answer to end in a 0, then I chose what it turns into.

For those whos brain are wired to think Algebra

Step 1:

Think of Any number.	let the nunber be n

Step 2:

Multiply it by 5.	5n

Step 3:

Multiply that result by 2.	2 × 5n = 10n

Step 4:

Subtract 3.	10n - 3

Whatever the value of n was, it will end with a zero and subtracting 3 will give us a 7 as last digit.

For those whos brain are wired to think Arithmetic

Remember: Any number Multiplied by 10, you just add a zero to the end. So it will always end in 0.

Step 2 and 3 is where the x10 is hidden in to the trick.

Instade of saying x10 at once.
It brings in factors of 10 which are 5 and 2 [5×2=10]

Conclusion

The more you play with numbers, the more your Math-o-Phobia gradually vanishes. Even mathematics can be fun

YOUR TURN.
Drop your result in the comments. Did it work?

I would love to invite @sadematthew, @jonathan0, @stevographix, @rubee2as1, @ikechukwu77 and @sammy75 to drop a comment

Media Credit

Composer	@manuelhooks
Graphics from	Galaxy-A15
Entry type	[Freelance]
Community	Steem For Bangladesh
Date	Thursday 30th July
	(@) 2026