M

Manisha Agrawal • 9.32K Points
Tutor III Math 

Q. A number is decreased by 10% and then increased by 10%.  The number so obtained is 10 less than the original number. What was the oiginal number ?

  • (A) 1000
  • (B) 2000
  • (C) 3000
  • (D) 4000
Correct Answer - Option(A)
Explanation by: Manisha Agrawal 
Let the original number be x.
Final number obtained = 110% of (90% of x) =(110/100 * 90/100 * x) = (99/100)x. 
x-(99/100)x=10
=> x =1000

You must be Logged in to update hint/solution

Previous MCQ Next MCQ

Discusssion

Login to discuss.

Be the first to start discuss.

Related MCQs on Math

Q. The ages of Samir and Saurabh are in the ratio of 8 : 15 respectively . After 9 years the ratio of t...

Q. Two trains of equal length are running on parallel lines in the same direction at 46 km/hr and 36 km...

Q. If the rate of interest be 4% per annum for first year, 5% per annum foe second year and 6% per annu...

Q. Unit digit in (264)^102+(264)^103 is :

Q. The perimeter of a triangle is 30 cm and its area is 30 cm^2. If the largest side measures 13 cm, th...

Q. Sohan started a business with a capital of Rs. 80000. After 6 months Mohan joined as a partner by in...

Q. The angle of depression of a car, standing on the ground, from the top of a 75 m tower, is 30°. ...

Q. A man bought pencils at the rate of 6 for 4 and sold them at the rate of 4 for 6. His gain% in the t...

Q. The compound interest on ` 1800 at 10% per annum, for a certain period of time is ` 378. Find the ti...

Q. A man is walking at a speed of 10 kmph. After every km, he takes a rest for 5 minutes. How much time...

Learn All Math MCQs

Download our easy to use, user friendly Android App from Play Store. And learn MCQs with one click.

Image