Subject
Quantitative Aptitude
Topic
Percentage
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 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 ?
ক)
1000খ)
2000গ)
3000ঘ)
4000Explanation
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 =1000Related questions
The true discount on a bill of Tk. 540 is Tk. The banker's discount is:The present worth of a sum due sometime hence is Tk. 576 and the banker's gain is Tk. The true discount is:In a class, 120 students are male and 100 students are female 25% of the male students and 20% of the female students are engineering students. 20% of the male engineering students and 25% of the female engineering students passed the final exam, what percentage of engineering students passed the exam?Tk. 20 is the true discount on Tk. 260 due after a certain time. What will be the true discount on the same sum due after half of the former time, the rate of interest being the same?if 75% of a number is added to then the result is the number itself . The some of the number isThe present worth of Tk. 2310 due 2×(1/2) years hence, the rate of interest being 15% per annum, is:The banker's gain on a bill due 1 year hence at 12% per annum is Tk. The true discount is:A sum of money invested at compound interest amounts to Rs 4624 in 2 yrs and Rs 4913 in 3 yrs. The sum of money is