NUMBER SYSTEM

STATEMENT-1 : The charge of an isolated system is conserved. STATMEENT-2 : The positive charge of an isolated system is conserved. STATEMENT -3 : The number of charged particles of an isolated system is conserved.

In a telephone system four different letter P,R, S, T and the four digits 3, 5, 7, 8 are used. Find the maximum number of "telephone numbers" the system can have if each consists of a letter followed by a four-digit number in which the digit may be repeated.

Every enzyme in IUB system of classification has been given a code number which consists of

Number of crystal systems having only 2 types of bravais lattices = x, number of crystal system having at least two interfacial angles equal = y and number of crystal systems having all the three edge lengths equal = z. Then find the value of x xx y xx z.

What is the sum of group number and period number (according to IUPAC system ) of the non-metal which exist in liquid state at room temperature

Number of proteins belonging to complement system is