Which Indian cricketer is known as "Brown Bradman"?
Which of the countries has had a prime minister whose name featured the name of his country?
Which of the gulf city was a dependency of Bombay Presidency under British rule for almost a century?
Which of the following Pair are not parent and child who have both won the Nobel prize?
Which of these scientist was inspired to make its famous discovery in a sea voyage in 1921?
Which singer was originally named Eileen Angelina Yeoward?
Which is the only talkie film directed by Dada Saheb Phalke?
Which Shakespeare play was translated by the Bhartendu Harishchandra with the title Durlabh Bandhu, published in 1880?
Which company started by Europeans in Calcutta in 1818 was the first modern life insurance company established in India?
How IT teams gets to know if i connect USB to my company laptop?
There are three keys to the three doors with different locks on them.
How many attempts would be needed to determine the exact keys for all the doors under all circumstances?
let us say A B and C locks with a b and c keys
Try two keys on A if the keys are b and c it will not open obviously the key not tried is its key a.Leave it aside.
Again try one key of the left keys b and c (not known) if it opens lock B it is b if does not it is C. so total three attempts.
It can also happen that the first key opens lock A. The second attempt, if it opens lock B it is b if it does not it is c.In this case only two attempt will determine the keys.
It can also happen that the first key does not open lock A but the second does. Keep it aside and try the remainder of b and c on B. If it opens Lock B it is b and if does not it is c. In this case also total attempts are two.
Hence 3 is the answer.
If you are only allowed to press the 1 and 0 keys on a calculator with any of the add, take, times, divide and equals keys, what is the fewest number of presses needed to make the number 9 on the calculator?
Add together three numbers each time to score 45.
Each number can be used as many times as you wish.
How many different combinations are there?
5 10 15 20 25
Add together three numbers to score 20. Each number can be used as many times as you wish. How many different combinations are there?
4 6 8 10 12
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