The number of different mastrices which can be formed using 12 different real numbers is (A) `6(12)!` (B) `3(12)!` (C) `2(10)!` (D) `4(10)!|`

The number of different possible orders of matrices having 12 identical elements is: (A) 3 (B) 1 (C) 6 (D) none of these

Number of different striaght lines that cn be formed by joining 12 different points on a plane of which 4 are collinear is

The median of the first 25 whole numbers is: A)10 B)12.5 C)15 D)12

The number of positive numbers of not more than 10 digits formed by using 0,1,2 and 3 is (A) 18 (B) 24 (C) 4^10, 3^10 (D) 4^10-1

Which of the following numbers is a perfect number? 4 (b) 12 (c) 8 (d) 6

Let a and b be two different natural numbers whose harmonic mean is 10 then their arithmetic mean is (1)12 (2) 15 (3) 16 (4) 18

Find the number of ways in which 12 different beads can be arranged to form a necklace.

Number of ways in which 12 different things can be distributed in 3 groups, is

In a room there are 12 bulbs of the same wattage,each having separate switch.The number of ways to light the room with different amounts of illumination is (a) 12^(2)-1 (b) 2^(12) (c) 2^(12)-1 (d) none of these

Find the number of ways, in which 12 different beads can be arranged to form a necklace.