10 second questions

Jai Ganesh · 2008-11-29 18:19:45

#807. Which of the following is correct?
(a)2+3i>1+4i
(b)6+2i>3+3i
(c)5+8i>5+7i
(d)None of these

#808. What is the value of

?

#809.What is the value of

?

#810. What is the value of A if

?

Jai Ganesh · 2008-11-30 17:08:09

#811. What is the value of

?

#812. If

, and ,
then what is the value of ?

Jai Ganesh · 2008-12-02 02:18:18

#813. Two trains are moving in opposite directions at speeds
of 60 km/hour and 90 km/hour. Their lengths are 1.10 km and
0.9 km respectively. What is the time taken by the slower train to cross
the faster train in seconds?

#814. The first three numbers in a series are 3, 0, 3. What would the
30th number of the series be?

#815. What would the value of

be?

Jai Ganesh · 2008-12-02 19:05:04

#816. A fathers age is three times the sum of the ages of his
two children, but 20 years hence his age will be equal to the
sum of their ages. Then what is the fathers present age?

#817. A garden is 24 m long and 14 m wide. There is a path
1 m wide outside the garden along its sides. If the path is to be
constructed with square marble tiles 20 cm × 20 cm, then
what is the number of square marble tiles required?

#818. How many small cubes, each of 96 cm² surface area,
can be formed from the material obtained by melting a larger
cube of 384 cm² surface area?

#819. A student is to answer 10 out of 13 questions in an
examination such that he must choose at least four from the
first five questions. What is the number of choices available to him?

#820. A student scored 30% marks in the first paper of
Physics out of 180 marks. He has to get an overall score of at
least 50% in two papers. The second paper is carrying 150
marks. What is the percentage of marks he should score in the second
paper to get the overall average score?

Jai Ganesh · 2008-12-03 17:08:15

#821. If f(x) = x²-x, then what is the value of f(x-1) - f(x+1)?

#822. A comet is heading for Jupiter with acceleration 'a' of 50 km/s². The velocity of the comet at time 't' is given by f(t) = at² -at + 1. What is the velocity at time t =5 seconds?

#823. What is the Greatest Common Divisor of

?

#824. What is the least Common Multiple of (x+1)²(x-3) and (x²-9)(x+1)²?

#825. If p(x) = 5x²+3x-1 and

, then by factor theorem, the corresponding factor of p(x) is
(1)
(2)
(3)
(4)

Jai Ganesh · 2008-12-04 16:40:37

#826. What is the value of sin²1° + sin²2° + sin²3° +sin²4° + sin²5° + ................... sin²90°?

#827. Find the Greatest Common Divisor of

, , .

#828. Find the Least Common Multiple of

, , .

bitus · 2008-12-05 03:36:25

#826.

bitus · 2008-12-05 04:04:52

#826.

vichavicha · 2008-12-05 08:53:11

Q816. 30
Q817. 20
Q818. 8
Q820. 74
I could nt find how to hide. Sorry.

Jai Ganesh · 2008-12-05 17:19:13

Answers to #816 and #818 are correct!
Good start, vichavicha!

To use the hide tag,

 Use the following code(hide=#816)30(/hide)

(Instead of braces, use square brackets)
would give you

Jai Ganesh · 2008-12-05 18:05:51

Answer to #826:-
bitus,
.

#829. Find the Standard deviation of the first five natural numbers.

#830. The number of ice cream cones bought by men, women, boys, girls and children on a day at the trade fair was 40, 42, 46, 48 and 44 respectively. Find the standard deviation.

#831. The standard deviation of 7 values is 15.If each value is decreased by 8, find the standrad deviation and variance of the new set of values.

#832. The variance of 65 scrores is 64. if each of them is divided by 2, find the standard deviation and variance of the new scores.

Jai Ganesh · 2008-12-05 22:23:01

#833. What is the order and degree of the differential equation

?

#834. In a traiangle ABC, if a=4, b=8 and angle C = 60°, then
(1) C = 4√3 (2) Angle B = 30° (3) Angle C = 90° (4) None of these

TooT · 2008-12-05 23:57:36

bitus · 2008-12-06 09:11:20

#834

Jai Ganesh · 2008-12-06 17:56:51

Answers to #817 and #834:
TooT and bitus,
Please try again!

Jai Ganesh · 2008-12-06 19:24:01

#835. The probability that a student passes English test is 2/3, the probability that he passes both English and French tets is 11/15. The probability that he passes at least one test is 1/3. What is the probability that he passes the French test?

#836. A two-digit number is chosen from 1 to 100. Find the probability that is is either greater than 30 or less than 16.

#837. Find the probability that a card drawn out of a pack of 52 playing cards bears the number 3 or 7.

#838. A number is selected at random from 40 to 80. Find the probability that is is divisible by 6 or 9.

#839. Two dice are thrown together. What is the probability of getting a total of 8 or product of 12?

#840. Thee coins are tossed together. What is the probability that either only two heads or only two tails turn up?

Jai Ganesh · 2008-12-07 02:08:32

#841. If 6a43-46b9=1904, then which of the following should appear in the place of a?
(1) 4 (2) 6 (3) 9 (4) Cannot be determined (5) None of these

#842. What is the value of

?

#843. The unit's place in the product 81 x 82 x 83 x 84 x ....89 is ___.

bitus · 2008-12-07 04:35:55

#834

#835. Are you sure about the text? #836 #837 #838 #839 #840 #841 #842 #843

Jai Ganesh · 2008-12-07 16:52:31

bitus,

All correct!
But the answer I expected for #836 is 5/6 which is only addition of the two values you nhave given separately.
I checked question #835 again. there's nothing wrong with it.

Jai Ganesh · 2008-12-07 17:08:37

#844. A piece of paper in the shape of sector of a circle of radius 10 cm and of angle 216° just covers the lateral surface of a right circular cone of vertical angle 2θ. What is the value of sinθ?

#845. If x>0, xy=1, then what is the minimum value of x+y?
(1) 2 (2) 3 (3) 1 (4) 4

#846. Which is the smallest number which when divided by 12 and 16 leaves remainder 5and 9 respectively?

#847. The sum of the Greatest Commom Divisor and the Least Common Multiple of two numbers is 680 and the least Common Multiple is 84 times the Greatest Common Divisor. If one of the numbers is 56, find the other.

#848. What is the least number which when divided by 5, 6, 7, and 8 leaves a remainder of 3 but when divided by 9, leaves no remainder?

#849. Find the least Common Multiple of

.

#850. Find the least number when divided by 12, 15, 20, and 54 leaves a remainder of 8.

#851. The product of two numbers is 1320 and their Greatest Common divisor is 6. What is the Least Common Multiple of the numbers?

Jai Ganesh · 2008-12-08 17:55:08

#852. Find the angle in degrees between the hour hand and the minute hand when the time is 3.25.

#853. Evaluate

.

#854. Find the Compound Interest on $7,500 at 4% per annum for 2 years compounded annually.

#855.If the simple interest on a sum of money at 5% per annum for 3 years is $1,200, find the Compound Interest on the same sum for the same period at the same rate.

#856. A train 100 meters long is running at the speed of 30 kilometers/hour. Find the time taken by it to pass a man standing near the railway line.

Jai Ganesh · 2008-12-09 17:48:18

#857. Find the sum of 11 + 13 + 15 + ......35.

#858. The radius and height of a cone are respectively 7 centimeters and 6 centimeters. Find the volume.

#859. If the Universal Set, U = {1,2,3,4,5,6,7,8,9}, A = {1,3,5,7}, B = {1,3,4,5,6}, find

.

#860. Find m if

leaves a remainder 7 when divided by (x+1).

Jai Ganesh · 2008-12-10 03:11:52

#861. Two cones have their base raii in the ratio 3:2 and their vertical heights in the ratio 2:3. What is the ratio of their volumes?

#862. What is the sum of n consecutive odd integers beginning with 1 equal to?

#863. What is the relation between the volume 'V' of a sphere and its surface area 'S'?

#864. What is the quotient when 2x³ + x² - 5x + 2 is divided by (x+2)?

#865. What is the partial fraction representation of

?

(1)

(2)
(3) (4)

#866. What is the Greatest Common Divisor of 4(x-1)²(x+2) and 6(x-1)(x-2)?
(1) 24(x-1)²(x²-1) (2) (x-1) (3) 2(x-1) (d) 24(x-1)

Jai Ganesh · 2008-12-10 16:29:48

#867. If the 8th term of an Arithmetic Progression is zero, prove that its 38th term is triple its 18th term.

#868. Express 0.325325325325325............... as a fraction.

#869. Evaluate 1 + 8 + 27 ......125000.

#870. The circumference of the base of a cylinder is 110 centimeters. The area of the curved surface is 4400 square centimeters. Find its height.

#871. The radius and height of a right circular cone are in the ratio 5:12. If its volume is 314 cubic centimeters, find the radius and slant height.

Jai Ganesh · 2008-12-11 01:16:07

Integrate the following with respect to x:-

#872.

#873.

#874.

#875.

Math Is Fun Forum

#751 2008-11-29 18:19:45

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#752 2008-11-30 17:08:09

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