# YAHOO Placement Paper

**YAHOO PLACEMENT PAPER
**

1. In a village in each family they give birth to children till they get a boy. IF girl child they try again. What is the ratio of boys to girls.

2. 2n+1 numbers in a list except for 1 number all had duplicates, how to find duplicate in O(n)

3. In 1000 wine bottles stack 10 are poisoned given 10 rats what is the minimum number of tries to find the poisoned one. Rat dies once it licks the poisoned wine.

4. Write 1,3,6,4 using +,-,*,/ to get 24 (no repeat of numbers)

5. Which is the DS used in dictionary mode in mobile (t9)

6. Which is DS used for chess program…to predict move each and every time..

7. There are $1070 dollars how to split them into bags such that asked for any denomination from $1 to $1070 , u must b able to give without opening bag.

sir,please send questions with answers.