Logical puzzles

Today's logics....!!!

1. Every station on the railway system sells tickets to every other station. Some new stations were added. 46 sets of additional sets of tickets were required. How many new stations have been added? How many stations were there originally?

Answer: 2 new stations. (11 existing stations).


2. A factory was cutting rolls of cloth into 1 metre lengths, from a 200 metre roll. How long would it take for the machine to cut the roll if each cut took 4 secs?

Answer: 200m would only take 199 cuts not 200. (199*4 sec = 13.27 mins).


3. Which three of the four pieces below can be fitted together to form a perfect square?



Answer:  C B D. 


4. At college, 70% of the students studied Maths, 75% studied  English, 85% studied french and 80% studied German. What percentage at least must have studied all 4?

Answer:  10


5. A card player holds 13 cards of four suits, of which seven are black and six are red. There are twice as many hearts as clubs and twice as many diamonds as hearts. How many spades does he hold?


Answer:  6 ( The player holds 1 cub, 2 hearts and 4 diamonds. As he holds 13 cards ( or severn black cards), it follows that there must be 6 spades).