Look at this series: 53, 53, 40, 40, 27, 27, .. What number should come next? A. 12 B. 14 C. 27 D. 53

The mean of the set of 5 numbers {42, 3, 11, 27, x} is 24, and the median of the set of 4 numbers {53, 8, 29,y} is 38. If it can be determined, which of the following values is equal to x - y?

If in the expansion of (1+x)^n the coefficients of 14th, 15th and 16th terms are in A.P. then n= (A) 12 (B) 23 (C) 27 (D) 34

Prepare a frequency table of the following scores obtained by 50 students in a test: 42, 51, 21, 42, 37, 37, 42, 49, 38, 52 7, 33, 17, 44, 39, 7, 14, 27, 39, 42 42, 62, 37, 39, 67, 51, 53, 53, 59, 41 29, 38, 27, 31, 54, 19, 53, 51, 22, 61 42, 39, 59, 47, 33, 34, 16, 37, 57, 43

The length of one rod is 2.53 cm and that of the other is 1.27 cm . The least count of the measuring instrument is 0.01 cm . If the two rods are put together end to end , find the combined length.

The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

Show that 27! Is divisible by 2^12 . What is the largest natural number n such that 27 ! Is divisible by 2^n ?

Plot the points A(4,2),B(-5,3),C(-4,-5) and D(5,-2) .

The marks obtained by 12 students in an examination (out of 50) are given below: 18, 35, 2, 27, 40, 0, 21, 33, 27, 8, 36, 23 Find the mean marks.

What number should be added to each of the three numbers, 3,11 and 27 so that the resulting numbers form a geomatric sequence ?

If x, 2x+ 2, 3x + 3 are in G.P. , then the fourth term is (A) 27 (B) -27 (C) 13.5 (D) -13.5