18 Math Tricks That Will Blow Your Mind (TikTok Viral 2026)

Works on EVERYONE - Always gives 1089!

1. Ask someone to pick a 3-digit number (first and last digit must differ by at least 2)

2. Reverse the digits

3. Subtract the smaller number from the larger

4. Reverse that result

5. Add the two numbers together

Example: 521 - 125 = 396 → 396 + 693 = 1089 ✓

The "11s Trick" - 3 Million+ Views

To multiply 32 x 11:

For bigger numbers: If digits add to 10+, carry the 1!

Example: 78 x 11 → 7+8=15 → Put 5, carry 1 → 7+1=8 → 858

Multiplications by 9 Made Easy

Hold hands with fingers extended. Number fingers 1-10 from left to right.

To multiply 7 x 9: Fold down the 7th finger. Count fingers before = 6, fingers after = 3.

The "Base 10" Shortcut

To square 15: Multiply the second digit (5) by (5 + 10) = 5 × 15 = 75. Add 25 to the end.

Works for 11-19 every time!

Divide by 4, Add Two Zeros

48 x 25: Divide 48 by 4 = 12, then add "00" → 1200

Any 3-of-a-kind = 37

Pick a digit 1-9. Repeat it 3 times (like 444). Multiply by 37.

Wait - the REAL trick: Any 3-digit number with repeating digits (AAA) × 37 = AAAAA!

Multiply Numbers Near 100

97 × 94: Both are 3 and 6 away from 100.

First part: 100 - (3+6) = 91

Second part: 3 × 6 = 18

Multiply by 2, Divide by 10

To divide 85 by 5: 85 × 2 = 170 → Drop the zero → 17