Thirty six identical chairs must be arranged in rows with the same member of chairs in each row. Each row must contain at least 3 rows. A row is parallel to the front of the room. How many different arrangements are possible?
Topic: Unitary Method Quiz ( MCQ and Answer )
It takes 30 days to fill a laboratory dish with bacteria. If the size of bacteria colony doubles each day, how long did it take for the bacteria to fill one half of the dish?
A red light flashes 3 times per minutes and a green light flashes 5 times in two minutes at regular intervals. If both lights start flashing at the same time, how many time do they flash together in each hour?
A, B and C can do a work in 5 days, 10 days and 15 days respectively. They started together to do the work but after 2 days A and B left.C did the remaining work ___(in days).
Two workers A and B manufactured a batch of identical parts. A worked for 2 hours and B worked for 5 hours and they did half the job. Then they worked together for another 3 hours and they had to do (1/20)th of the job. How much time does B take to complete the job, if he worked alone?
A father left a will of Tk. 35 lakhs between his two daughters aged 8.5 and 16 such that they may get equal amounts when each of them reach the age of 21 years. The original amount of Tk. 35 lakhs has been intructed to be invested at a profit 0f 10%. How much did the elder daughter get at the time of the will?
Two identical taps fill 2/5 of a tank in 20 minutes. When one of the taps goes dry in how many minutes will the remaining one tap fill the rest of the tank?
A contract is to be completed in 56 days and 104 men were set to work, each working 8 hours a day. After 30 days, 2/5 of the work is completed. How many additional men be employed, so that the work may be completed in time if each man works 9 hours a day?
6 men and 8 women can do a work in 18 days. How many days will it require to complete the whole work if 3 men and 5 women work together?
A club has 20 members. They are electing a president and a vice-president. How many different outcomes of the election are possible? (Assume the president and the vice-president must be different members of the clube.)
A man 6 feet tall casts a shadow 4 feet long; at the same time a flagpole casts a shadow that is 50 feet long. How tall is the flagpole?
A, B and C can do a piece of work in 16, 32 and 48 days, respectively. They started working together but C left after working 4 days and B, 2 days before the completion of work. How many days it took to comlete the work?
Five cups of flour are required to make a large batch of cookies. How many cups of flour are required to make enough cookies to fill 12 cookie jars, if each cookie jar can hold 1.5 batches?
Jamil can type a 20-page document in 40 minutes, Saheen can type it in 30 minutes, and Johra can type it in 24 minutes. Working together, how much time will it take them to type the same document?
In this pocket, aboy has 3 red marbles, 4 blue marbles and 4 green marbles. How many will he have to take out of his pocket to ensure that he has taken out at least one of each color?
A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?
The price of commodity X increases by 40 paisa every year, while the price of commodity Y increases by 15 paisa every year. if in 2001, the price of commodity X was Tk. 4.20 and that of Y was Tk. 6.30, in which year commodity X will cost 40 paisa more than commodity Y?
Three time the present age of a father is equal to eight times the present age of his son. Eight years hence the father will be twice as old as his son at that time. What are their present ages?
Sarah is twice as old as her youngest brother. If the difference between their ages is 15 years. How old is her youngest brother?
It takes 30 days to fill a laboratory dish with bacteria. If the size of bacteria colony doubles each day, how long did it take for the bacteria to fill one half of the dish?
A group of workers can do a piece of work in 24 days. However as 7 of them were absent it took 30 days to complete the work. How many people actually worked on the job to complete it?
A contractor estimates that he can paint a house in 5 days by using 6 men. If he actually uses only 5 men for the job how many days will it take to do this job?