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Practice Test - Mathematics 12

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Question 1

The value of (7.995)^1/3 correct to four decimal places, is

Question 2

The sum of the integers lying between 1 and 100 or including and divisible by 3 or 5 or 7 is

Question 3

The value of x for which the matrix
A =

is inverse of B =

Question 4

The total number of ways in which a beggar can be given at least one rupee from four 25-paise coins, three 50-paise coins, and two one-rupee coins is

Question 5

The number of flags with three-strips in order that can be formed using 2 identical red, 2 identical blue and 2 identical white strips is

Question 6

If the mean of the series x₁, x₂, ......, x_n is

, then the mean of the series x_i + 2i, i = 1, 2, ........, n will be-

Question 7

The number of real roots of the quadratic equation

(n > 1) is

Question 8

If (y² – 5y + 3)(x² +x +1) < 2x for all x ∈ R, then the interval in which y lies is

Question 9

If in an examination different weights are assigned to different subjects Physics (2), Chemistry (1), English (1), Maths (2) a student scores 60 in Physics, 70 in Chemistry, 70 in English and 80 in Maths, then weighted A.M. is

Question 10

A line passes through (1, 0). The slope of the line, for which its intercept between y = x – 2 and y = –x + 2 subtends a right angle at the origin, is

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