🧠See this math tricks:

If you want to multiply a two-digit number by 11, here’s a lightning-fast trick:

Step 1: Add the two digits together.

Step 2: Place the result between the digits.

✅ Example 1:

45 × 11 → (4 + 5) = 9 → 495

✅ Example 2:

72 × 11 → (7 + 2) = 9 → 792

✅ Example 3 (with carry):

89 × 11 → (8 + 9) = 17 → Write 7 in the middle, carry 1 → 979

Formula:

If the number is AB, then

AB × 11 = A (A + B) B

(add carry if needed)(Thu,27 November,2025)

🚨See this problem:

Ans:127✅

See (2×7)+1=15

       (2×15)+1=31

       ...............

       ................

       (2×63)+1=127 (Thu,18 September,2025)

🚨SQUARE ROOT OF A PRIME NUMBER:

Formula:√N=√a-|N-a|/2√a

Where N is given number and a is nearest square term

Example:Find square root of 23 

Ans:√23=5-|23-25|/2×5

                 =5-2/10

                 =5-0.2

                 =4.8(approximately)

Formula:√N=√a-|N-a|/2√a

Where N is given number and a is nearest square term

Example:Find square root of 23 

Ans:√23=5-|23-25|/2×5

                 =5-2/10

                 =5-0.2

                 =4.8(approximately) (wed,3rd September,2025)