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Recent questions tagged class10
Questions
Given below are the steps of construction to draw a tangent with out using the center of the circle. Step 1: Draw any chord PQ through the given point P on the circle. Step 2: Take a point R on the circle and join P and Q to a point R. Step 3 : Construct $\angle QPY < \angle PRQ$ and on the opposite side of the chord PQ. Step 4: Produce YP to X to get YPX as the required tangent. Which of the above steps are correct ?
olympiad
math
ch-7
construction
class10
asked
Jan 6, 2015
by
meena.p
1
answer
Given below is the construction to draw a circle whose radius is 4 cm with center O and diameter POQ and through P or Q to draw a tangent to the circle. Which step is wrong in the construction ? Step 1 :Taking O as circle as center and radius equal to 4 cm draw a circle. Step 2: Draw diameter of POQ Step 3 : Construct $\angle PQT =45^{\circ}$ Step 4 : Produce TQ to T' obtain the required tangent TQT'
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
meena.p
1
answer
The these sides of a triangle of a triangle ABC are 8 cm,10 cm and 12 cm. These circles are drawn with centres A,B and C each one touching the other two. The radii of circles are ___________
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
meena.p
1
answer
In two concentric circles, a chord of length 24 cm of larger circle becomes a tangent to the smaller circle Whose radius is 5 cm. The radius of the larger circle is _________
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
meena.p
1
answer
O is the center of a circle of radius 9 cm. A point P at a distance of 41 cm from O. The length of the tangent segment from P to the circle is _________
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
meena.p
1
answer
ABC is a right angled triangle at A. A circle is inscribed in it. The length of two sides the right angle are 12 cm and 5 cm. The radius of the incirle is ______________
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
meena.p
1
answer
Two circles of radii 6 cm and 14 cm have their centres 30 cm apart. The radius of the smallest circle which touches both of them and encloses the smaller circle is ____________
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
meena.p
1
answer
Two circles with centre A and B and of radii 5 cm and 3 cm touch each other internally.If the perpendicular bisector of segment AB meets the bigger circle in P and Q,then the length of PQ is ___________
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
sreemathi.v
1
answer
In the given figure TAS is a tangent to the circle,with centre O,at the point A.If $\angle OBA=32^{\large\circ}$,then the values of $x$ and $y$ are _____
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
sreemathi.v
1
answer
In the given figure chords AB and CD of a circle intersect at O.AO=5 cm,BO=3 cm and CO=2.5 cm.Then the length of DO=______
olympiad
math
ch-7
circles
class10
asked
Jan 5, 2015
by
sreemathi.v
1
answer
In the given figure,AD is the bisector of $\angle BAC$.If $BD=2$ cm,$DC=3$ cm and $AB=5$ cm,then $AC$=______
olympiad
math
ch-7
triangles
class10
asked
Jan 2, 2015
by
sreemathi.v
1
answer
In two similar triangles $ABC$ and $DEF,AC=10\;cm$ and $DF=8\; cm$ and $AB=6.5$ cm then $DE$=______
olympiad
math
ch-7
triangles
class10
asked
Jan 2, 2015
by
sreemathi.v
1
answer
The modal class for the following frequency distribution is ________
olympiad
math
ch-8
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The median class for the following distribution is _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The class marks of classes $15-35$ and $20-40$ is________
olympiad
math
ch-8
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The mean of the following data is $20.6$ , then the value of p is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
If the mean of the following distribution is $2.6$ , then the value of k is
sat
math
problem-solving-and-data-analysis
olympiad
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The mode and mean are $26.6 $ and $ 28.1$ respectively in a distribution then its median is _______
sat
math
problem-solving-and-data-analysis
olympiad
ch-8
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
In a distribution, the arithmetic mean and median are respectively $30 $ and $32$ , then its mode is ________
olympiad
math
statistics
class10
asked
Nov 10, 2014
by
meena.p
1
answer
The times in seconds taken by $150$ athletes to run $110 \;m$ hurdle race an given below . The no.of athletes whose completed the race in less than $14.6$ seconds is __________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
If $x_i$'s are the midpoints of the class intervals of grouped data, $f_i$'s are the corresponding frequencies and I is the mean, then $ \sum (f_i x_i - \bar {x} )$ is equals to ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 10, 2014
by
meena.p
1
answer
Two dice are thrown simultaneously. The probability of getting six as product is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
A box of 600 electric bulks contains 12 defective bulks. One bulls is taken out at random from this box. Then the probability that it is a non- defective bulb is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
0
answers
One card is drawn from a well shiffled deck of 52 cards. Then the probability of drawing 10 of a black suit is _____
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The probability that a leap year selected at random, will contain 53 sundays is _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
A bag contains 12 balls out of which x number of balls are white . If 6 more white balls are put in the bag, the probability of drawing a white ball will be double than that when the probability of drawing a white ball at random. Then the value of x is ________.
olympiad
math
probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
Two dice are thrown simultaneously. The probability o getting six as the product is ________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
On throwing two cubical dice simultaneously, the probability that the sum of the digits on the top faces of the two dice is greater than 7 or less than 7 is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The probability of getting a sum greater than 15 on throwing 3 dice is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
When three coins are tossed simultaneously, the probability of getting at least one tail is _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The ratio of the probability of getting a 4 on throwing a dice and getting a sum of 10 on throwing two dice is ______
olympiad
math
probability
class10
asked
Nov 7, 2014
by
meena.p
1
answer
The mean weight of 8 numbers is 15. If each number is multiplied by 2, the new mean is _____
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of 11 number is 35. If the mean of first 6 number is 32 and that of last 6 number is 37, the sixth number is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of 5 numbers is 18. If one number is excluded their mean is 16. The excluded number is ________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of marks scored by 100 students was found to be 40, Later on it was discovered that a score of 53 was misread as $83$. The correct mean is ______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of 5 numbers is 18. If one number is excluded , their mean is $16^{\circ}$. then the excluded number is ________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mode of a frequency distribution can be determined graphically from
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The median of a given frequency distribution is found graphically with the help of
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The mean of a discrete frequency distribution $\large\frac{x}{f_i} $$; i=1,2,3,.n$ is given by
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 -a, x_2 - a, ....... x_n - a$ is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If $\bar{x}$ is the means of n observations $x_1,x_2,.....x_n$ then the mean of the observations $x_1 +a, x_2 +a, ....... x_n +a$ is _________
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If $\bar {x} $ is the mean of ten natural numbers $x_1,x_2,x_3......x_{10}$ , then $(x_1 - \bar {x}) +(x_2 - \bar {x})+ ..... (x_{10} - \bar {x} )$ is _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
statistics-and-probability
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If the numerator of a fraction is multiplied by 2 and its denominator is increased by 2, it becomes $\large\frac{6}{7}$. If instead we multiply by 2 and increase the numerator by 2, it reduces to $\large\frac{1}{2}$ , the fraction is :
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The ratio of two numbers is $4:1$ . If 5 is added to both the number obtained becomes $3:1$ The numbers are :
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The denominator of a fraction is 4 more than twice the numerator. When both the numerator and denominator are decreased by 6, then the denominator becomes 12 times the numerator. Then the fraction is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The sum of the numerator and denominator of a fraction is 3 less than twice the denominator . If the numerator and denominator are decreased by 1, the numerator becomes half the denominator. Then the faction is
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
If we add 1 to the numerator of a fraction, it reduces to $\large\frac{1}{2}$ . If we subtract 1 from its denominator it reduces to $\large\frac{1}{3}$ . Thus the fraction is _____
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 6, 2014
by
meena.p
1
answer
The given system of equation $=3x+4y =5; \large\frac{9}{2} $$x -6y=\large\frac{15}{2}$has :
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
A system is said to be inconsistent if _______
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
The following system of the equation represents ______ lines . $3x-4y=-7;3x-4y=-9$
olympiad
math
ch-8
areas-related-to-circles-surface- areas-and-volumes
class10
asked
Nov 5, 2014
by
meena.p
1
answer
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