If you (1) subtract from any number divisible by 19, 5 (2) add 1 to its hundreds place digit;
The new number that you will get will also be divisible by 19. Try it.
To give an example 190. (1) 85 (2) 2; so new 285. 285 ÷ 19 = 15. To make the trick work fast exclude numbers ending with 00 to 04. Happy Mathematics Day. Birthday of India's great Mathematician Ramanujam.
The new number that you will get will also be divisible by 19. Try it.
To give an example 190. (1) 85 (2) 2; so new 285. 285 ÷ 19 = 15. To make the trick work fast exclude numbers ending with 00 to 04. Happy Mathematics Day. Birthday of India's great Mathematician Ramanujam.
