Tag: math & puzzles

The integers 1,2,3,...40 are written on a blackboard.The following operation is then repeated 39 times.In each repeatition any two numbers ,say a and b,currently on the blackboard are erased and a new number a+b-1 is written.What will be the number left on the board then?

Tap A and Tap B can fill a tank in 10 hours and 20 hours respectively. Tap C can empty the tank in 30 hours. Tap A and Tap B are opened for 5 hours. After that Tap C is opened. Find the total time taken in filling the tank upto 87.5% of its volume.

Rudrani buys 2 Apples, 3 Oranges and 4 Mangoes for Rs.20 and Prachi buys 4 Apples, 7 Oranges and 10 Mangoes for Rs. 50. Find the total price of 1 Apple, 1 Orange and 1 Mango.

Anand was talking to Megan Fox in a party. Referring to her father he said "I am his only daughter's son's maternal grandmother's son's brother in law". How is Anand related to Megan Fox??