-
5+5+5 , u have 2 make just a slight change and make it 550
dpsrathore
- May 22nd, 2008
Put these two "+" on the right side five as +5+ and come close thes Pluse slowly so this figer convert in a rectangle which diveded by a horizotal line... and delet now this horizontal line automatic it will change in 550
karthika
- Jul 13th, 2006
Remove + symbols and then subract 5 u get 550
-
Xxxxyyyyzzzz------yxxxz------(Addition)
X=? y=? z=?
sachuis2cool
- Sep 7th, 2006
I got the simplest method...I'll explain it step by step...seems to be lenghty but it is not.we know,Y is carried and any 2 digits between 0 to 9 sum up to a number less than 20.So Y must be 1ie. Y=1....
-
If 1!+2!+3!………10! in this sum what is the lost digit.
ankit_goyal_1988
- Dec 27th, 2009
Answer is 3Here is the clue.Last digit is1!= 12!= 23!= 64!= 45!= 06!= 07!= 08!= 09!= 010!=0+----------- 13Hence last digit is 3
deepika
- Sep 19th, 2006
Sorry its not 5 its 3
-
Island of imperfection Puzzle
On the Island of imperfection there is a special road, Logic Lane, on which the houses are usually reserved for the more mathematical inhabitants. Add, Divide and Even live in three different houses on this road (which has houses numbered from 1-50). One of them is a member of the Pukka Tribe, who always tell the truth; Another is a member of the Wotta Tribe, who never tell the truth; and the third...
-
(may infi 28th may-kindly solve) 1)one day I was going somewhere.I found charity 1,charity 2,charity 3. for charity 1,I gave half of the money what I have plus Rs 1. than for charity 2 I gave half of the money that was remaining with me plus Rs 2. than for charity 3 I gave half of the money that was remaining with me plus Rs 3. finally I was left with Rs 1 only. what amount I had initially.
sany
- Jul 24th, 2006
Ya its 42.....same one came for me tdy in infy paper........
jetendra
- Jul 5th, 2006
at first u assume the initial be Xfor the 1charity : u have spend is (X/2)+1 remaining is (X/2)-1for the 2charity : u have spend is (((X/2)-1)/2)+2 remaining is (((X/2)-1)/2)-2for the 2charity : u hav...
-
-
Grass in lawn grows equally thickand in auniform rate. It takes 24 days for 70 cows and 60 for30 cows . How many cows can eat away the same in 96days.?
gaurav4067
- Dec 5th, 2010
g - grass at the beginning r - rate at which grass grows, per day y - rate at which one cow eats grass, per day n - no of cows to eat the grass in 96 days From given data, g + 24*r = 70 * 24...
Jaichandran.R
- Feb 13th, 2007
Answer is 10.When the days increases from 24 to 60, no. of cows decreases from 70 to 30,hence the reduction in cows for 36 days increment is obtained by half of the previous days cows ,that is 70/2= 3...
-
Find the total number of rectangles (include squares also as rectangles) in a 8 * 8 standard chessboard?
Amit Garg
- Feb 13th, 2015
Answer is = 204.
Here is the logic
single box= 8x8
double boxes=7x7
three boxes =6x6 ....
and so on till eight boxes = 1x1 = 1
so 64+49+36+25+16+9+4+1 = 204 -
(x to power 1/3) - (x to power 1/9)=60 We have to find out the value of x ??
ragav
- Dec 12th, 2007
Let x to power 1/9 = tthen, t^3- t = 60t^3 >> t (except for t=1)therefore,t^3 is approximately = 60Therefore , t = 4 and x=4^9= 262144
-
Train Speed
A train ran at a certain speed for one hour and then due to a technical problem, it ran at 3/5th of its original speed and reached the destination 2 hrs late. The driver said, had the problem occurred 50 miles later, we would have gained 40 minutes. What is the distance between the two cities that the train
traveled?Abhash SInha
- Sep 4th, 2011
In this question, we have to solve for original time and original speed and then we will calculate the total distance. Let x & y be the speed & time respectively. Therefore, total distance=xy mile FI...
hsirah
- Oct 1st, 2010
Total distance is 200 km.Case 1: t1 + t2 = T +120Case 2: t1 + t2_ + t3_ = T+80t2 -(t2_+t3_) = 40(t2-t3_)-t2 = 40t2 = x2/(3/5*x1/60)t3_ = x3_/(3/5*x1/60)t2 = x2_/x1/60Also x2 - x3_=50you can solve for ...
-
Two concentric rings of uniform density at every point Are placed on a flat surface. Now since the centre of mass of a uniform Ring is its geometrical centre, the distance between the centers of Mass of the two rings are zero. Thus according to newtons law of Gravitation the attraction between themes (or at least tends to be) infinite, Making it impossible to pull one ring radially out from the other. However, as We know, this is not true. Why?
kiranaar10728
- Jun 19th, 2008
if u intend to apply inverse square law to rings, Force between them is not inversely proportional to the distance between their centre of mass as one may comprehend. some log of distance terms will b...
indu
- Sep 9th, 2005
How come the inverse sguare law is not valid when distance tends to zero? Suppose if the distance is not zero,if it is of the order of 10^(-30) or above, even then the force is much greater. And comming to the nxt, the effective distance is considered b/w the 2 bodies.
-
Pythagorean triplets with Consecutive natural numbers
For readers interested in Pythagorean triplets with Consecutive natural numbers, take any odd number -- say 11 -- and square It. 11 squared = 121 = 2(60)+ 1. Add 60 squared to both sides to get 11 squared + 60 squared = 60 squared + 2(60) + 1 = (60 + 1) squared = 61 squared. What do we get? (11, 60, 61). Works every time. Prove it For a general case.
stockball
- May 24th, 2011
This is an overly simple algebra question. The first form of the equation is x^2 = 2y + 1. The second form of the equation is x^2 + y^2 = (y+1) ^2, which is just y^2 + 2y + 1. Subtract the y^2 from both sides of the equation and you again have x^2 = 2y + 1.
C. Sivasankaran
- May 16th, 2006
There are some other ways also1. Multiples of the Odd number triplets, say for example 3, 4, 5 Its multiples also triplets i.e. 6,8,10 ; 9, 12, 15 ;&nbs...
-
-
There was a robbery happened at a bank and 3 suspects taken into custody. Their statementsA: I am innocentB: I am innocentC: B did it.I didn\'t remember names, In these three one is lying and we have to find the culprit
stockball
- May 24th, 2011
The question is invalid. If only one is lying, then if A & B told the truth and C lied, C is the culprit. But if C told the truth, then A also told the truth and B is the one lying, so B would be the culprit. Bad question.
arun4p
- Sep 2nd, 2006
Suppose c is the culprit and liar.then both a and b are talking the truth,and c who is the culprit is telling the lie.
-
Infosys Puzzles
1) there are 4 links in a golden chain.one has 5 links,other has 4 links and other 3 linkks.goldsmith takes 50.00paise to open the link and 1.00/- to attach the link.what is least cost to bake whole bracelet?2)a square is of side 1 km.a man travels first 2 sides with 30mph and third side with 60kmph.what is the speed that man has to travel the fourth side if average speed is 60kmph? 3) there are 600...
Swaraj Ranjan Behera
- Mar 21st, 2013
Let,the shape of the bracelet is closed circle.[It is supposed to assume] gold chain with 5 links: A_ _ _ _ _B gold chain with 4 links: C_ _ _ _D gold chain with 3 links: E_ _ _F gold chain with 3 lin...
-
Ramesh sit around a round table with some other men. He has one rupee more than his right person and this person in turn has 1 rupee more than the person to his right and so on, Ramesh decided to give 1 rupee to his right & he in turn 2 rupees to his right and 3 rupees to his right & so on. This process went on till a person has 'no money' to give to his right. At this time he has 4 times the money to his right person. How many men are there along with Ramesh and what is the money with poorest fellow.
Suraj Grewal
- Feb 11th, 2012
There are 3 persons sitting with the right hand of Ramesh
assume Ramesh=4
a=3
b=2
c=1
Ramesh gives 1 rs/- to a he has 3 left
now a has 4 and gives 2 to b remaining a has 2
now b has 4 and gives 3 to c remaining b has 1
now c has 4 and gives 4 to Ramesh and remaining c has 0.
gaurav4067
- Dec 7th, 2010
Here, consider there are n number of persons sitting on the table. Let Ramesh has Rs. x. Then the person to his right will have (x-1) then to his right will have (x-2) and so on till the person to...
-
-
-
A man who got parvir chakra in 1948 died when his age was 1/39th the year of his birth. when was his year of birth..?
pardhu
- May 20th, 2006
hix+x/39=1948=>x=1900
-
Challenging Puzzles
Ans