Answer / guest

The formula to find number of diagonals (D) given total
number of vertices or sides (N) is

N * (N - 3)

D = -----------

2

Using the formula, we get

1325 * 2 = N * (N - 3)

N2 - 3N - 2650 = 0

Solving the quadratic equation, we get N = 53 or -50

It is obvious that answer is 53 as number of vertices can
not be negative.

Alternatively, you can derive the formula as triange has 0
diagonals, quadrangel has 2, pentagon

has 5, hexagon has 9 and so on......

Hence the series is 0, 0, 0, 2, 5, 9, 14, ........ (as
diagram with 1,2 or 3 vertices will have 0

diagonals).

Using the series one can arrive to the formula given above.

1)You take a test, and 60% pass the first time and 40% fail. The second time around,80% pass the test and 20% fail. The third time, 90% pass and 10% fail. a. What is the probability that you pass on the 2nd time? b. What is the probability that you pass on the 3rd time? c. What is the probability you fail?

2 Answers   TCS, Winit,

---

One of the following is my secret word: AIM DUE MOD OAT TIE. With the list in front of you, if I were to tell you any one of secret word, then you would be able to tell the number of my secret word. Which is my secret word?

8 Answers   AIM Research, Contata, Exxon Mobil, IBM, TCS, Vernalis Systems,

---

A polygon has 1325 diagonals. How many vertices does it have?

1 Answers   Samsung,

---

how do you plan to achieve these goals?

1 Answers  

---

Once a week a wagon driver leaves his hut and drives his wagon to the river dock to pick up supplies for his town. At 4:05 PM, one-fifth of the way to the dock, he passes the Temple. At 4:15 PM, one-third of the way, he passes the Preetam-Da-Dhabaa. At what time does he reached the dock?

1 Answers  

---

How will you differentiate a 5 rupee(indian currency)or any five currency coin?Answer me how will you differentiate????? This question is asked in a college appitute test.Any one know help me plzzzzz!!!!!!!!!!!!!

2 Answers  

---

You have 8 coins. 3 of them weigh x units, 3 y units, 1 a units and 1 b units. They are all mixed and look identical. You have to find the lightest coin in minimum number of weighing (balance)

1 Answers   Oracle,

---

Five students - Akash, Chintan, Jignesh, Mukund and Venky - appeared for an exam. There were total five questions - two multiple choice (a, b or c) and three true/false questions. They answered five questions each and answered as follow. I II III IV V -------------------------------------------------- Chintan c b True True False Akash c c True True True Jignesh a c False True True Mukund b a True True False Venky b b True False True -------------------------------------------------- Also, no two students got the same number of correct answers. Can you tell which are the correct answers? What are their individual score?

1 Answers  

---

what job position/s are you currently holding with your current employer?

0 Answers   Qatar Airlines,

---

Raj has a jewel chest containing Rings, Pins and Ear-rings. The chest contains 26 pieces. Raj has 2 1/2 times as many rings as pins, and the number of pairs of earrings is 4 less than the number of rings. How many earrings does Raj have?

5 Answers   Capital IQ,

---

if 12+22=24 23+8=6 32+13=40 73+16=144 then 36+2=?

8 Answers   Wipro,

---

Can u pl send me the model question paper or previous 5 year question paper for South Indian Bank's clericl post.Pl do send it to my mailId:nan_april4@yahoo.co.in

1 Answers  

---