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You are not logged in. #376 20090206 15:45:21
Re: Brain TeasersAnswers to #269, and #271: Character is who you are when no one is looking. #377 20090206 16:28:45
Re: Brain Teasers#273. Let . What are the numbers N is divisible by?#274. What is the number of distinct triangles that can be formed with integral value sides, the perimeter of the triangle being 14 units? Character is who you are when no one is looking. #378 20090207 01:39:17
Re: Brain Teasers#275. Sam has forgotten his friend's seven digit telephone number. He remembers the following: the first three digits are either 635 or 674, the number is odd, and the number nine appears once. If Sam were to use trial and success method to call his friend, what is the minimum number of trials he has to make in order to be certain to succeed? Character is who you are when no one is looking. #379 20090207 02:10:51#380 20090207 16:07:03
Re: Brain TeasersAnswer to #275: Character is who you are when no one is looking. #381 20090207 16:12:48
Re: Brain Teasers#276. What is the least value of n such that #277. There are two positive numbers such that their Arithmetic Mean is 10 and their Geometric Mean is 8. Find the two numbers, and find their Harmonic Mean. #278. The first three terms of a Geometric Progression are x, x+3, x+9. Find the value of x and also find the sum of the first eight terms. Character is who you are when no one is looking. #382 20090208 01:08:59
Re: Brain Teasers#279. What is the number of solutions the equation 2x+y=40 has such that both x and y are positive integers and ?#280. The length, breadth, and height of a room are in the ratio 3:2:1. By what percentage would the area of the four walls increase or decrease if the breadth and height are halved and the length is doubled? #281. What is the value of if ? Character is who you are when no one is looking. #383 20090208 01:14:20
Re: Brain Teasers#282. If x = 0.5, which of the following has the least value? (2) (3) (4) (5) #283. Which among the following has the greatest value? . #284. Consider a sequence where the term is . What is the value of ? Character is who you are when no one is looking. #384 20090208 17:09:55
Re: Brain Teasers#285. A square is inscribed in a circle (The diagonals of the square are equal in length to the diameter of the circle). A circle is then inscribed in the square (the side of the square is equal in length to the diameter of the circle), as given in the rough diagram below. What is the ratio of the area of the larger circle to the smaller circle? Character is who you are when no one is looking. #385 20090208 23:26:47#386 20090208 23:49:32
Re: Brain TeasersAnswer to #285: Character is who you are when no one is looking. #387 20090211 01:46:55
Re: Brain Teasers#286. Consider the set . How many Arithmetic Progressions can be formed with the elements of S that start with 1 and end with 1000 and have atleast 3 elements?Character is who you are when no one is looking. #388 20090214 01:29:42
Re: Brain Teasers#287. Consider the following sets, Universal Set U, sets A and B, . What is equal to? Character is who you are when no one is looking. #389 20090214 01:33:21
Re: Brain Teasers#288. If the sum of the first 10 terms of an Arithmetic Progression with first erm p and common difference q is 4 times the sum of the first 5 times, then what is the ratio p:q equal to? , what is the value of m? Character is who you are when no one is looking. #390 20090214 02:50:55
Re: Brain Teasers#290. What is the sum of the first 50 terms of the series Character is who you are when no one is looking. #391 20090214 04:16:58#392 20090215 00:18:01
Re: Brain TeasersAnswer to #290: Character is who you are when no one is looking. #393 20090215 01:27:13
Re: Brain Teasers#291. What is the value of #292. What is the value of ? #293. What is the value of x if ? #294. In a triangle ABC, the length of the sides in centimeters are and . What is the length of a in centimeters? #295. What is the value of ? Character is who you are when no one is looking. #394 20090215 09:32:05#395 20090215 17:16:34
Re: Brain TeasersAnswers to #291, 3292, and #293: #297. If A(2,3), B(1,4), C(0,2), and D(x,y) are the vertices of a parallelogram, what is the value of (x,y)? #298. What is the value of if ? #299. What is the value of x if ? #300. What is the coefficient of in the expansion of ? Character is who you are when no one is looking. #396 20090215 21:08:36
Re: Brain Teasers#301. If are the binomial coefficients in the expansion of, then what is the value of ? #302. If the binomial coefficients of three consecutive terms in the expansion of are 220, 495, and 792 respectively, what is the value of n? Character is who you are when no one is looking. #397 20090216 17:51:55
Re: Brain Teasers#303. There are three Clubs A, B, and C in a town with 40, 50, and 60 members respectively. 10 people are members of all the three clubs, and 70 are members of only one club. How many people are members of exactly two clubs? Character is who you are when no one is looking. #398 20090216 18:11:47
Re: Brain Teasers#306. A square is drawn by joining the midpoints of the sides of a given square. A third square is drawn by joining the midpoints of the second square.This process is continued indefinitely. If a side of the first square is 8 centimeters, what is the sum of areas of all the squares in square centimeters? Character is who you are when no one is looking. #399 20090218 01:37:49
Re: Brain Teasers#307. What is the probability of getting five heads and seven tails in 12 flips of a balanced coin? #309. The straight line ax + by + c = 0 and the coordinate axes form an isosceles triangle under what condition? #310. A wire 34 centimeters long is bent in the form of a quadrilateral of which each angle is 90° . What is the maximum area enclosed by the quadrilateral? Character is who you are when no one is looking. #400 20090218 02:19:10
Re: Brain Teasers#311. If are the roots of the equation , what is the value of ?#312. if A and B are any two events such that , and where stands for the complementary event of A, then what is ? Character is who you are when no one is looking. 