My favourite things are... Dancing singing song and solving problem at deep night.

After many years, two friends met. In the discussion, it was found out that both of them were married and in the water. The first friend asked the second friend the number of his children and he replied that the sum of their ages was 13. When he asked for some more information to find out the age of each, he said that the product of their ages is equal to the number of windows in the building next to them. The first friend asked for some more information and the second friend said that if the younger son has blue eyes. Then the first friend was able to find out the age of each of his children. Find out their ages by mathematical analysis.

[translated by google translate]

Please ans for my ask?

Problem 2. Doma is blindfolded and there are 50 two-rupee coins on the table, ten of which are moons. Now these coins should be flipped as desired and divided into two forms in such a way that each cup has equal number of moons. (One side of the coin has the moon and the other the stars).

[Translated by google translate]

Any body can solve this? If you solve that? Send me...

Problem 1.

Rahim Sahib has three sons, five daughters and seven grandchildren. If he divides his money among boys, one rupee is quoted, if he divides it among girls, two rupees remain. The money is left over if it is divided among the grandchildren What is the minimum amount of money that Mr. Rahim has?

[Translated by google translate]

কোডফোর্সে অবদান বাড়ানোর উপায়? আপনি যদি 5টি আপভোট পান তবে আপনি +1 অবদান পয়েন্ট পাবেন এবং শুধুমাত্র একজন ব্যক্তি এটিকে ডাউনভোট করলে আপনি আপনার স্কোর থেকে একটি পয়েন্ট হ্রাস পাবেন। এমনকি যদি কেউ পরে এটিকে আপভোট করে এবং আপভোটের সংখ্যা আগের মতোই পৌঁছে যায়, অবদানের পয়েন্টটি যেখানে ছিল সেখানে ফিরে যায় না।

Ways to increase contributions to Codeforce?

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source: google translate [Kown from codeforces blog]