Here is one question which one of my students, Vedant Sahai asked me. It appeared in his computer subject exam of his recent ICSE X exam (Mumbai):
write a program to accept a number from the user, and check if the number is a happy number or not; and the program has to display a message accordingly:
A Happy Number is defined as follows: take a positive number and replace the number by the sum of the squares of its digits. Repeat the process until the number equals 1 (one). If the number ends with 1, then it is called a happy number.
For example: 31
Solution : 31 replaced by 
So, are you really happy? 🙂 🙂 🙂
Cheers,
Nalin Pithwa.
For the love of Maths: the Queen of all Sciences 
In Hindi “Harsha” means “happiness”. And D. R. Kaprekar defined Harshad Numbers as the number which is divisible by its sum of digits. Wiki: https://en.wikipedia.org/wiki/Harshad_number
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Oh….this certainly is “composition of happinesses” ! ha…ha…ha…lol…thanks a lot …
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