Mathematics Questions and Answers

2×[0.3(1.3+3.7)] of 0.8 =?

If sin (A/2) = x, then the value of x is

If 169/(0.169)=(16.9)/x then the value of x is:

The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. Find the mean of marks of the students of three divisions of class X.

A student multiplied a number by 6/7 instead of 7/6. What is the percentage error in the calculation?

A shopkeeper by selling 23 Lotto shoes, earns a profit equal to the selling price of 7 Lotto shoes. His profit percentage is:

In an army selection process, the ratio of selected to unselected was 3:1. If 60 less had applied and 30 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

A bank offers 5% compound interest per half year. A customer deposits 3200 each on 1^st January and 1^st July of a year. At the end of the year, the amount he would have gained by way of interest is:

An item costs ₹400. During a festival sale, a company offers a sale discount that offers x% off on its regular price along with a discount coupon of 10%. The price of the item after using both the sale discount and the discount coupon, is 216. What is the value of x?

if x+y+3=0, then find the value of x³+y³-9xy+9.

The ratio of the monthly incomes of A and B is 11: 13 and the ratio of their expenditures is 9: 11. If both of them manage to save ₹4,000 per month, then find the difference in their incomes (in ₹).

Some students (only boys and girls) from different schools appeared for an Olympiad exam. 20% of the boys and 15% of the girls failed the exam. The number of boys who passed the exam was 70 more than that of the girls who passed the exam'. A total of 90 students failed. Find the number of students that appeared for the exam.

The value of $\frac{\sin 23°\cos 67°+sec52°\sin 38°+\cos 23°\sin 67°+\cos ec52°\cos 38°}{\cos e{c}^{2}20°-{\tan }^{2}70°}$ is :

Find the greatest number 23a68b, which is divisible by 3 but NOT divisible by 9.

If $4{\sin }^2\theta =3(1+\cos \theta ),0°<\theta <90°$ , then what is the value of $(2\tan \theta +4\sin \theta -sec\theta )$ ?

Find the value of the following expression:

37256 x 7-5+2

A sold a mobile phone to B at a gain of 25% and B sold it to C at a loss of 10%. If C paid 5,625 for it, how much did A pay (in ) for the phone?

The lengths of the three sides of a right-angled triangle are (x-1) cm, (x + 1) cm and (x+3) cm, respectively. The hypotenuse of the right-angled triangle (in cm) is: