Use of letters to denote numbers

A matrix denotes a number

A letter look consists of three rings marked with 15 different letters. If N denotes the number of ways in which it is possibel to make unsuccessful attempts to open lock, then

Write the following using a letter Four times a number is 24

Whatdoos the letter 'P' denote in the term 'PAN' as used in financial transactions ?

The maximum number of letters that can be used as a symbol of an element is ……….

By using all the letters of the word AAIPEEAL' words are formed.If N denotes number of such words in which no E comes before A and do not contain the word 'IPL' then ((N)/(5)) is equal to

Mohan post a letter to Sohan. It is known that one letter out of 10 letters do not reach its destination. If it is certain that Sohan will reply if he receives the letter. If A denotes the event that the Sohan receives the letter and B denotes the event that Mohan gets a reply, then

What does the letter 'F' denote in the abbreviated name TIFCL'?