Question

Sneha did a math magic with her friend Kriti. She asked her to think of a two-

digit number. Then she asked her to add the digits of the number and then

multiply the sum by 5. She asked her to add 5 to the product and multiply the

result by 2. Then she asked her to divide the result by 10 and to subtract the sum

of the digits from this number. Sneha told Kriti that number left is 1. Kriti is

amazed. Can you help Kriti to understand this magic?​

Answer 1

Step-by-step explanation:

Its simple

let's just say the number is AB

sum of the digits = A+B

multiplying it with 5 gives 5A+5B

and then adding 5 will give 5A+5B+5

now multiplying by 2 gives 10A+10B+10

now dividing by 10 gives A+B+1

and finally substracting the sum of numbers give

(A+B+1) - (A+B) = 1

Booooom Magic it resulted in 1

I wonder where is this question from!