Maths MCQs

A can do a certain work in 15 days. B is 10% less efficient than A, and C is 20% more efficient than A. All the three work together for 3 days. The remaining work is completed by D alone in $ 9\frac12$ days. D alone can complete the original work in: Options:a) 15 daysb) 18 daysc) […]

The difference between the height and the radius of a solid cylinder is 23 cm. The total surface area of the cylinder is 1628 cm22,The height and the radius of the cylinder, respectively, are π=$ \frac {22}{7}$ : Options a) 33 cm , 10 cmb) 30 cm , 7 cmc) 32 cm , 09 cmd)

The number of years taken for a sum of Rs 5,000 to become Rs 5,832 at a rate of 16% per annum compounded half yearly, will be:  Options a) 1.5 yearsb) $ \frac 12$ yearsc) 2 yearsd) 1 years Solution As per question P = 5000A = 5832R = 16% Rate half yearly (r) =

The value of $ \frac {33}{40} + \frac {1}{5} [\frac{4}{5} – \frac{1}{5} \times (\frac {7}{8} – \frac {5}{4})] – \frac {4}{5}$ is : Options a) $ \frac 15$b) $ \frac 14$c) $ \frac 17$d) $ \frac 13$ Solution As per question$ \frac {33}{40} + \frac {1}{5} [\frac{4}{5} – \frac{1}{5} \times (\frac {7}{8} – \frac {5}{4})] –

Two numbers are in the ratio 9 : 11. If their HCF is 23, then the difference of the two numbers is: Options a) 46b) 146c) 56d) 253 Solution As per question Two numbers are in the ratio a : b = 9 : 11HCF = 231st No. = 23 x 9 = 2072nd No.

A shopkeeper buy a table fan marked at Rs 2,600 on 18% discount He marked it for Rs 2,800 and allows a 15% discount. How much does he earn? Optionsa) Rs. 420b) Rs. 200c) Rs. 220d) Rs. 248 Solution As per questionCP = $ \frac {2600 \times 18}{100}$ = 468 Rs.= 2600 – 468 =

The perimeter of an equilateral triangle is $ 36\sqrt{3} $ cm. Find its height. Options: a) 10 cmb) 18 cmc) 9 cmd) 6 cm Solution: Perimeter of an equilateral triangle = 3 x sides =$ 36\sqrt{3} $side =$ 12\sqrt{3} $ Height of triangle is = $ \frac{\sqrt{3}}{2} \times $side=$ \frac{\sqrt{3}}{2} \times 12\sqrt{3}$= $ 6\sqrt3 \times

A train can cross a tunnel of length 600 m in 54 second, and it can cross a 350 m long bridge in 36 second. Which of the following statements is/are correct?(i) The speed of the train is 60 km/h. (ii) The length of the train is 150 m. Options a) Only statement (ii)b) Only

A loss of $ 10\frac12$ % gets converted into a profit of $ 11\frac35$ % when the selling price is increased by Rs 132.60. The cost price (in Rs) of the article is : Solution: Let the Cost Price (CP) = 100a First case: SP = CP- CP x Loss%SP= $ 100a – 100a \times

The number of student in class IX and class X is 42 and 45, respectively. The ratio of the number of boys to girls in classes is IX and X is 9 : 5 and 8 : 7, respectively, What is the difference between the total number of boys and the total number of girls