There is a school with 100 students and correspondingly 100 lockers, all of which start off closed. The first student opens every locker and the second students closes every other locker starting with the second (2,4,6...etc..) . The 3rd student changes the state of the lockers numbered (3,6,9.. etc.). The fourth student changes the state of the lockers numbered (4,8,12.. etc..).. This continues until all the 100 students passes along the lockers.. when all the 100 student is done which locker is closed and which locker is in open condition?
Answer Posted / kiruthika.s
All the odd number lockers are opened,all the even number lockers are closed
Is This Answer Correct ? | 2 Yes | 13 No |
Post New Answer View All Answers
A & B can do a piece of work in 21 & 24 days respectively. The started to work together but after some days BA leaves, B completes the remaining work in 9 days. After how many days does A leaves
The Parallelogram PQRS, the line RS have midpoint T from line PQ. What is the ratio of Triangle PTS / parallelogram PQRS?
12 Blacksox and 12 Whitesox mixed in a box,a pair of sox is picked at a time,in which pick how many pick ,to get the right pair(black&black or white&white)?
A man can row downstream at a rate of 14 kmpl & upstream at 9 kmpl. Find man's rate in still water ?
A farmer has a farm square of 100 sq.m a cow is tied at one and with a rope of 10m length.assume pi-3.what is the area of land the cow can graze.
A building with height D shadow upto G. What is the height of a neighbouring building with a shadow of C feet.
epaulette : shoulder :: tiara :
There are two natural numbers. A cube difference of the squares is a square difference of their cubes.These are the smallest possible numbers. what is the sum of these numbers?
How many 1's are there in the binary form of 8*1024 + 3*64 + 3
There are two queues at a discount store billing counter. In the first queue there are a1 customers all with b1 items in their cart, while in the second queue there are a2 customers all with b2 items in their cart. It takes t seconds to process each item and p seconds for each person to pay. A customer wishes to know which queue to join.Which one of these options gives the condition for the first queue to be the better queue to join?
WRITE ABOUT A RECENT VISIT TO A RESTAURANT.
A sum of money becomes 2.5 times itself at 12.5% simple interest p.a. What should be the period of investment to get this much return?
Find the difference of the minimum number of numbers required to form every number from 1 to 1234 and 1 to 4321.
If the operation,^ is defined by the equation x ^ y = 2x + y,what is the value of a in 2 ^ a = a ^ 3
If A=Z, B=Y, C=X, .......... Z=A, Then LIMIT = ?