Sopantyadvayam Antyam

 Sopantyadvayam Antyam" is a Vedic mathematics sutra that translates to "The sum of the products of the exterior and interior." This sutra is used for multiplying two numbers when the sum of their digits is 10, and the numbers have a difference of 2.

For example, if you want to multiply 48 and 42 using the "Sopantyadvayam Antyam" sutra:

  1. Add the last digits of both numbers: 8 + 2 = 10.

  2. Multiply the first digits of both numbers: 4 * 4 = 16.

  3. The product is obtained by placing the results from step 2 and step 1 side by side: 1610.

This sutra provides a quick method for multiplying numbers with specific properties, making mental calculations more efficient.

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