List of top Questions asked in Bihar Board Class X Exam

The median of 15, 6, 16, 8, 22, 21, 9, 18, 25 is:
The mode of 0, 6, 5, 1, 6, 4, 3, 0, 2, 6 is:
The median and mode of a frequency distribution are 48:64 and 46:52 respectively. Then its mean is:
If the mean of five observations \(x\), \(x + 2\), \(x + 4\), \(x + 6\), and \(x + 8\) is 11, then the value of \(x\) is:
What is the probability of an impossible event?
If \( P(E) = 0.4 \), then the value of \( P(E') \) is:
In \( \triangle ABC \), \( \angle C = 90^\circ \), then \( \sin(A + B) = \)
sec\(^2 23^\circ\) - tan\(^2 23^\circ\) + 2 =
If \( x \cos \theta = 1 \) and \( \tan \theta = y \), then the value of \( x^2 - y^2 \) is
If \( \tan \theta = \frac{3}{4} \), then \( \sin \theta \) is
If \( \sqrt{\frac{1 + \cos A}{1 - \cos A}} \) is, then the correct option is:
From an external point \( P \), two tangents \( PA \) and \( PB \) are drawn to a circle. If \( PA = 6 \, \text{cm} \), then \( PB = \)
If two tangents drawn on a circle of radius 3 cm are inclined to each other at an angle of \( 60^\circ \), then the length of each tangent is
If \( \sin(20^\circ + \theta) = \cos 30^\circ \), then the value of \( \theta \) is
The ratio of the areas of two circles is \( x^2 : y^2 \). Then the ratio of their radii is
The area of a circle is \(49\pi\) square cm. Then its diameter is
The distance covered by a wheel of radius 14 cm in 5 revolutions is
If the area of a circle is equal to the area of a square, then the ratio of their perimeters is
The distance between two parallel tangents of a circle is 10 cm. Then the radius of the circle is
If two circles touch each other externally, then what is the number of common tangents?
The H.C.F. of two consecutive odd numbers is
tan 5° · tan 25° · tan 30° · tan 65° · tan 85° =
cos 38° · cos 52° - sin 38° · sin 52° =
\[ \frac{\text{cosec} 42^\circ}{\sec 48^\circ} \times \frac{\cos 37^\circ}{\sin 53^\circ} = \]
\( \sqrt{2} \left( \sin \frac{\pi}{4} + \cos \frac{\pi}{4} \right) =\)