Ants/bees/ tigers are greater in number than any other animals in the world.

How many numbers of 4 digit greater than 6000 can be formed with the digits 3,4,5,6,8? (no digit is repeated in any number). How many of these numbers so formed.

5 times of the greater one of two numbers is 2 more than 8 times of the smaller one. Again 2 times of the smaller one is 10 more than the greater one. Find the two number.

How many numbers of 4 - digit greater than 6,000 can be formed with the digits 3,4,5,6,8? (No digit is repeated in any numbers . ) How manay of these numbers so formed are odd?

Find the number of positive integers, which can be formed by using any number of digits from 0, 1, 2, 3, 4, 5 but using each digit not more than once in each number. How many of these integers are greater than 3000? What happened when repetition is allowed?

The number of integers greater than 6000 that can be formed ,using the digits 3, 5 , 6 , 7 and 8 , without repetition is -

One of two organ pipes has a diameter greater than the other. Even if the lengths of the two organ pipes are equal , the pitch of the fundamental tones differ. Why ?

Which of the allotropic forms of carbon conducts heat better than any other material?

Consider the experiment of tossing a coin. If the coin shows head, toss it again but if it shows tail then throw a die. Find the conditional probability of the event that the die shows a number greater than 4 given that there is at least one tail

Find the values of the parameter a for which the roots of the quadratic equation x^2+2(a-1)x+a+5=0 are such that one root in greater than 3, and the other is smaller than 3

At an election a voter may vote for any number of candidates not greater than the number of candidates to be chosen there are 10 candidates and 5 members are to chosen the number of ways in which a voter may vote at a least one candidate is given by