Puzzle

There are a 1000 locks in closed position. 1000 children numbering 1 to 1000 approach the lock one by one. The rule is the child (say with number 'n') can open or close the lock numbering  in multiples of "n" only.
so the child in number one position can open all the locks. Child number 2 will be able to close all the locks in multiples of 2 (like 2, 4, 6 .... upto 1000). The other locks will remain as they are.
After all the 1000 children have had their chance, how many locks will be in open position.

puzzle

In a debate the Professor's father's son was meeting with the Professor's son's father.
Will the Professor be a part of the meeting.

Maths Challenging questions

shoot me the answer of this question

Passengers are queuing  outside the Railway Station at a Constant Rate. If the railway authorities open up 3 gates, it takes 9 minutes to clear the queue. If instead the railway authorities were to open 5 gates, the queue would have got cleared in 5 minutes. How many minutes before opening of the gates did the first passenger arrive outside the station.

puzzle, JMO

There are three temples and one pond before each temple. One person carries some flowers and dips it in the first pond. Number of flowers become 100 times. He then offers some flowers in the first temple.He goes with the balance to second pond and takes a dip. Again the number of flowers increases by 100 times. He offers the same number of flowers at second temple and leaves with the balance  flowers to the third pond. There after the dip the number of flowers increase by 100 times. He offers same number of flowers at temple 3 and nothing remains with him afterwards. So how many flowers did he have in the beginning.

puzzle

Your mother stays in Pune. You want to pay  a visit on her birthday, and give her a gift of 2 cakes.
On the way to Pune, you will run into 7 check post for collecting toll. You can pay them in kind. In such a case they will demand 1/2 of all your cakes as the price of entry. As a goodwill gesture they return back 1 cake to you.
How many cakes do you need to carry to be able to give 2 cakes to your mom.

puzzle

Puzzle:
Here is a list showing the month and the number for each month...
January                     7110
February                     826
March                       5313
April                           541
May                          3513
June                          4610
July                           4710
August                        681
Decipher the logic and find the number for September?

number puzzle

solve the following:

if
5+3+2 = 151022
9+2+4 = 183652
8+6+3 = 482466
5+4+5 = 202541
then find the value of 7+2+5 =

Number Puzzle

If A³ = _ _ _ _ 76, where A is an element of Natural number. Find A and all the missing numbers.

clock puzzle

At how many minutes past 8 O' clock does the minute arm and the hour arm coincide between 8 O' clock and 9 O' clock?

clock puzzle

In an accident the minute arm and the second arm of the wrist watch is lost. The watch now has only the hour arm in the correct position.
What is the minimum time that can be measured accurately?

number puzzle

Number Puzzle

 

number puzzle

Number Puzzle

 

Puzzle

A, B and D are good in Hockey and Volleyball. C and A are good in Hockey and Baseball. D and B are good at Cricket and Volleyball. C, D and E are good at Football and Baseball.

Find out, who of the following is good in all the games.

puzzle

if 6 girls A, B, C, D, E and F have 10 marbles each. A and B take 4 marbles each from D and E respectively. C gives 3 marbles to F who in turn gives 2 marbles to D and 4 marbles to E. E takes back the marbles she had given to B and gives these to C.

Who has got 1 more marble than E?
How many marbles has D less than B?

number puzzle

If 
5 - 4 = 23
8 - 1 = 63
6 - 16 = 32
9 - 9 = 78
3 - 9 = 6
then find the value of 3 - 81 

Puzzle

JMO problems on Direction

Puzzles

Puzzle --- JMO

An unfortunate mouse has entered the trash compactor whose walls are 15 meters apart. The walls of the compactor begin to close in on the mouse at a speed of 0.2 meter per hour. The mouse panics and starts to runs from one of  walls' that is closing in, to the opposite wall in order to escape, over and over  until the compactor walls meet each other . The mouse runs at a speed of 10 meters per hour. How much distance does the mouse run before it dies?

puzzle

1    A shopkeeper is selling his goods at a profit of 25%. One day a customer bought a toy worth Rs 400. The customer gave the shopkeeper a Rs 500 note. Since the shopkeeper did not have the change, he went to the next shopkeeper for help. His neighbouring shopkeeper gave him 5 notes of Rs 100 after taking the Rs 500 note from the him. The shopkeeper then returned Rs 100 to the customer. In the evening the neighbouring shopkeeper came back to the shop and told the shopkeeper that the Rs 500 note that he had given to him is fake. The shopkeeper promptly returned him a fresh Rs 500 note. How much money did the shopkeeper loose?

A) 500                   B) 920                    C) 600                    D) 1000

Puzzle

Leela and Bela are 2 sisters. Leela is now 20 years old. Leela puts Rs 250 in her piggy bank on each birthday. Her sister Bela is a little naughty. She takes out Rs 50 from the piggy bank of Leela on each of her birthday. On attaining an age of 60 Leela decides to find out how much she has in her piggy bank. She breaks the piggy and finds only Rs 500. What is the date of birth of Leela?

algebra puzzle

Solve the following: 

ABCD × D = DCBA

where each Alphabet represents a unique number: