Sarah is twice as old as her youngest brother. If the difference between their ages is 15 years. How old is her youngest brother?
Correct answer(s):
- 15
Topic
Unitary Method
Practice related MCQ quizzes and improve step by step.
Quizzes in Unitary Method
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?
Correct answer(s):
- 29 days
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?
Correct answer(s):
- 28
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?
Correct answer(s):
- 6
Azhar works thrice as much as Baten and is therefore able to finish a piece of work in 60 days less than Baten. Find the time in which they can do it together.
Correct answer(s):
- 22.5 days
Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?
Correct answer(s):
- 1800
Farid can complete a job in 12 hours, and Jibon can complete the same job in 8 hours. Farid starts the job at 9 a.m., and stops working at 3 p.m. If Jibon starts working at 4 p.m. to complete the remaining job, at what time is the job finished?
Correct answer(s):
- 8 p.m.
Jesmin spent one-third of her money on books and half of the remaning money on clothing. She then spent three-fourths of what she had left on food. She had 500 left over. How much money did she start with?
Correct answer(s):
- Tk 6000
If an object travels at five feet per second, how many feet does it travel in onw hour?
Correct answer(s):
The cost to ride on a ferry is Tk. 500 per vehicle and drive with an additional cost of Tk. 50 per passenger. If the charge to get on the ferry is Tk. 650, how many people were in the vehicle?
Correct answer(s):
- 3
On a Map, 1 inch represents 20 miles. The distance between 2 towns is 6.5 inches. How many miles are actually between the two towns?
Correct answer(s):
- 124 miles
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?
Correct answer(s):
- 35
At present, father’s age is 4 times more than that of his son. 6 years ago father’s age was 10 times more than that of his son. What is their present age?
Correct answer(s):
- 36 and 9 years
In a race of 200m, A can beats B by 31m and C by 18m. In a race of 350m, C will beat B by ___.
Correct answer(s):
- 22.75m