Infosys  Placement Paper   Aptitude - Puzzle   -

#### Infosys  Placement Paper   Aptitude - Puzzle   -

• Posted by  FreshersWorld
7 Jan, 2012

Puzzle

1) A woman had some melons to sell. she sold half of the number of melons she had plus half a melon and she was left with one melon. HOW many melons she had at the start??? (just like 12th problem of puzzles to puzzle by shakuntala devi)
Ans. 3 melons.
Explanation: lets say she had X melons. half the number of melons will be X/2.if she sells half....she remains with half...so remaining are X/2.but she sells half a melon more...so 1/2 shou;d be subtracted from the remaining......so sha has now (X/2-1/2) and that is equal to 1.
X/2 - 1/2 = 1.
X/2 = 3/2
X = 3

2)If u reverse the digits of fathers age u get the sons age.One year ago fathers age was double the age of son. Find their ages.(just the calculations were time consuming....it was not solvable...TRIAL AND ERROR got the answer)
Ans: Son:37
Father:73

3) Analytical question...George summers type.

4) Analytical question...GRE type

5) There are 13 rats sitting in a cirle. Out of them just one rat is white in colour.A cat starts eating and goes around the cirle. From where should the cat start to make sure that every 13th rat she eats is white.
Ans.: The cat should start from the mouse just adjacent to the white mouse and go in direction opposite from the white mouse.

6) problem no. 44 of Shakuntala devi puzzles to puzzle you. but the figures were different.

7) Analytical ....George sunmmers type.

8) There was some problem of pigeons and birds..i dont remember...it was on the lines of problem no. 266 of Shakuntala devi More Puzzles.