# Mathematics Questions for CDS & AFCAT: 19th December

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 the Mathematics Section of all sorts of defence examinations.

**Q1. A boat covers 30 km upstream and 44 km downstream in 10 hours. The same boat takes 13 hours to cover 40 km upstream and 55 km downstream. What is the speed of the boat in still water?**

(a) 8 km/h

(b) 6 km/h

(c) 11 km/h

(d) 5 km/h

**Q2. The average temperature of Monday to Wednesday is 37°C and that of Tuesday to Thursday is 34°C. If the temperature on Thursday is on that of Monday then what will be the temperature on Thursday?**

(a) 45°

(b) 36°

(c) 50°

(d) 40°

**Q3. The sale of a business man in 5 consecutive months was Rs. 6,435, Rs. 6,927, Rs. 7,230, Rs. 6,855 and Rs. 6,562 respectively. How much should he sell in 6th month in order to make the average sale of Rs. 6,500?**

(a) 4991

(b) 5991

(c) 6991

(d) 6001

**Q5. The price of a coin depends upon the product of its thickness and the square of the diameter. The ratio of thickness of two coins is 8 : 9. If the value of the second coin is double of the first coin then what will be the ratio of their diameters?**

(a) 2 : 3

(b) 3 : 4

(c) 4 : 5

(d) 32 : 51

**Q9. The circumference of two concentric circles are 62.832 m and 37.6992 m. Find the area between the circles.**

(a) 203

(b) 205

(c) 201

(d) 207

**SOLUTIONS**

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