There are `n` locks and `n` matching keys. If all the locks and keys are to be perfectly matched, find the maximum number of trails required to open a lock.

What is lock and key hypothesis ?

If characteristic of three numbers a, b and c and 5, -3 and 2, respectively, then find the maximum number of digits in N = abc.

The lock of a safe has a dial with holes, sasy ten, in which the numbers 0,1,2,……..9 are inscribed in each hole. The lock can be opened only when a specific code numbersay of six digits is dialled. Suppose the code number is 249916, it means that the can be opened when we first dial 2, then 4 nd so on. Find the maximum number of trials which do not result in opening the lock.

In a mixture of sample of H-atoms and He ions, electrons in all the H-atoms and He^+ ions are present in n = 4^"th" state. Then, find maximum number of different spectral lines obtained when all the electrons make transition from n=4 upto ground state

Find the maximum number of electrons are represented by quantum numbers n=3, l=1 .

In a sample one H atom is in 1^(st) excited state, two He^+ ion are in II^(nd) excited state and three Li^(2+) ions are in III^(rd) excited state. Then , find the maximum number of spectral lines which can be obtained , when all possible transitions terminate at n=1 :

Who proposed the lock and key hypothesis to explain the mechanism of enzyme action and in which year?

Find the rule which gives the number of matchsticks required to make a pattern of n such shapes.

If the maximum number of trials required to open all locks when there are n locks and n keys is 105, then n =

The lock and key model of enzyme action illustrate that a particular enzyme molecule