Mathematics Questions for CDS & CAPF: 15th September

Dear Students, Defence Adda is providing you all with this quiz on Mathematics questions for CDS, AFCAT, CAPF and other Defence Examinations. The questions asked in Mathematics Section of most of the defence examinations are based on the topics from Mathematics of Class 11th and 12th. The questions asked in this section are complex and comparatively difficult but once attempted with high accuracy, can fetch you full marks in this section. Also, practice on a daily basis helps one dive into the core concepts of a subject and thus, help her perform to the best of her ability in the real examinations. So, attempt the daily quizzes being provided by Defence Adda and score to the maximum in Mathematics Section of all sorts of defence examinations.

Q1. A dishonest dealer defrauds to the extent of 10% in buying and 20% in selling and claims that he earns only 10% profit what will be the gain percent on his outlay. 
(a) 51.25%
(b) 37.5%
(c) 43.75%
(d) 45.2%

Q2. The tax on an article decreases by 10% and its consumption increases by 10% find effect percent on its revenue.  
(a) 1% increase
(b) 2% decrease
(c) 1% decrease
(d) 2% increase

Q3. A man makes 80 articles in the 1st hour. His efficiency decreases by 25% in the 2nd hour, increases by 40% in the 3rd hour, decreases by 33 1/3% in the 4th hour and increases by 142/7% in the 5th hour (his efficiency increases or decreases with respect to the efficiency in previous hour). If he works for 5 hours, then find the average of total article made by the man in 5 hours.
(a) 70
(b) 67.5
(c) 68.8
(d) 66.7

Q4. A can do as much work as B and C together can do. A and B can together do a piece of work in 10 hours and C can do it in 50 hrs. Then, time that B needs to do the work alone is –  
(a) 20 hrs.
(b) 24 hrs
(c) 25 hrs
(d) 30 hrs.

Q5. A man buys a car on making a cash down payment of Rs. 1,62,240 & promises to pay two more yearly installments of equivalent amount to down payment in next two years. If the rate of interest is 4% per annum compounded yearly, the cash value of the car is (in Rs.)  
(a) 468240
(b) 468420
(c) 234120
(d) 234210

Q9. A cistern measuring 80 cm × 50 cm × 30 cm has 12000 cm³ water in it. Porous bricks are placed in the water until the cistern is full to the brim. Each brick absorb one seventeenth of its own volume of water. How many bricks can be put in without overflowing the water, each brick being 22.5 cm × 7.5 cm × 8.5 cm 
(a) 100 
(b) 120
(c) 160
(d) 80


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