You have four 9's and you may use any of the (+, -, /, *) as
many times as you like. I want to see a mathematical
expression which uses the four 9's to = 100

How many such expressions can you make?



You have four 9's and you may use any of the (+, -, /, *) as many times as you like. I want to..

Answer / guest

There are 5 such expressions.

99 + (9/9) = 100

(99/.99) = 100

(9/.9) * (9/.9) = 100

((9*9) + 9)/.9 = 100

(99-9)/.9 = 100

Is This Answer Correct ?    20 Yes 6 No

Post New Answer

More Puzzles Interview Questions

Classic: If a bear walks one mile south, turns left and walks one mile to the east and then turns left again and walks one mile north and arrives at its original position, what is the color of the bear

16 Answers   ADP, Microsoft, OSI, TCS, Tech Mahindra,


Karan bought a little box of midget matches, each one inch in length. He found that he could arrange them all in the form of a triangle whose area was just as many square inches as there were matches. He then used up six of the matches, and found that with the remainder he could again construct another triangle whose area was just as many square inches as there were matches. And using another six matches he could again do precisely the same. How many matches were there in the box originally? Note that the match-box can hold maximum of 50 matches.

1 Answers  


If you are in a jail. there a window having two rodes one is made of Iron and other is of magnet. using a rope how could you find magnet or iron rod.

4 Answers  


When Alexander the Great attacked the forces of Porus, an Indian soldier was captured by the Greeks. He had displayed such bravery in battle, however, that the enemy offered to let him choose how he wanted to be killed. They told him, "If you tell a lie, you will put to the sword, and if you tell the truth you will be hanged." The soldier could make only one statement. He made that statement and went free. What did he say?

5 Answers   CTS,


if 8men works 8hrs per day for 8days get rs.45,then how many men required if the work is 5hrs per day for 10days they get rs.60?(want solution with steps)

4 Answers   Syntel, Zensar,






Sarika multiplied 414 by certain number and obtained 69958 as the answer. But she found that there is some error in the answer - both the 9s in the answer are wrong and all the other digits are correct. Can you find the correct answer?

5 Answers   PayPal,


There is a 50m long army platoon marching ahead. The last person in the platoon wants to give a letter to the first person leading the platoon. So while the platoon is marching he runs ahead, reaches the first person and hands over the letter to him and without stopping he runs and comes back to his original position. In the mean time the whole platoon has moved ahead by 50m. The question is how much distance did the last person cover in that time. Assuming that he ran the whole distance with uniform speed.

4 Answers  


Arrange five planets such that 4 of them add up to 5th planet numerically. Each of the letters of the planet should represent a unique number from the range 0 - 9. You have to use all ten digits. There is an amazing mathematical relationship exists among the names of the planet.

2 Answers  


Three men, including Gianni and three woman, including Sachi are in line at the BrentWood post office. Each has two different pieces of business to conduct. 1. The first person is a woman. 2. Carlos wants to send an overnight package. 3. Lau is just ahead of Pimentelli who is the same sex as Lau. 4. Gianni is two places ahead of the person who wants to buy stamps. 5. Knutson - who is the opposite sex than Rendler - isn't the person who wanted to complain about a mail carrier. 6. The six people, not necessarily in the same order are - Anthony, Donna, the person who wants to fill out a change-of-address form, the one who wants to buy a money order, the one who wants to send Airmail to Tibet and the second person in the line. 7. The four tasks of the last two people in line, not necessarily in the same order are - sending books fourth class, buying a money order, picking up a package and complaining about a mail carrier. 8. The person who wants to send books fourth class is just behind a person of the same sex. 9. Mary is just behind a person who wants to send an insured package. 10. The person who wants to send Airmail to Tibet is either two places ahead of or two places behind the one who wants to add postage to his or her meter. 11. Anthony isn't two places behind the who wants to pickup a registered letter. 12. Toriseza is two places ahead of the person who wants to pick up a package. 13. Knutson isn't just ahead of the person who wants to send an item parcel post. Can you figure out where each customer is in the line, his or her full name (one surname is Loti) and the two things he or she wants to accomplish? Provide your answer is POSITION - FIRST NAME - LAST NAME - BUSINESS format.

1 Answers  


John lives in "Friends Society" where all the houses are in a row and are numbered sequentially starting from 1. His house number is 109. Jessy lives in the same society. All the house numbers on the left side of Jessy's house add up exactly the same as all the house numbers on the right side of her house. What is the number of Jessy's house? Find the minimal possible answer.

1 Answers  


Yesterday in a party, I asked Mr. Shah his birthday. With a mischievous glint in his eyes he replied. "The day before yesterday I was 83 years old and next year I will be 86." Can you figure out what is the Date of Birth of Mr. Shah? Assume that the current year is 2000.

6 Answers  


Given two bucket of large capacity. There are 100 black ball and 100 white ball. Distribute the balls among two bucket such that probability of choosing a white ball is maximum.

3 Answers   Oracle,


Categories