UNIT-10: Elementary Mathematics and General Mental Ability

The ratio of incomes of two persons is 9 : 7 and the ratio of their expenditures is 4 : 3. If each of them manages to save Rs. 2,000 per month, their monthly incomes are

The discriminant of the quadratic equation $x^2 - 8x + 4 = 0$ is

If cot θ = 7/8 ; value of (1 + sin θ)(1 - sin θ) / (1 + cos θ)(1 - cos θ) is

Angular component of part B in the given figure is

The LCM of two numbers is 2079 and their HCF is 27. If the first number is 189, the second number is

Latika offers a discount of 20% on all the items at her shop and still makes a profit of 12%. Cost price of an article marked at Rs. 280 is

If the diagonals of a parallelogram are perpendicular to each other, then it is a

In a triangle ABC, ∠A = 100° and sides AB and AC are equal. Then value of ∠B is

An observer, 1.5 meter tall is 28.5 meter away from a chimney. The angle of elevation of the top of the chimney from his eyes is 45°. Height of the chimney is

There are 100 students in a hostel. Food provision for them is for 20 days. How long will these provisions last, if 25 more students join the group ?

To balance the following, replace stars (*) by mathematical operations :
(15 * 8) * (30 * 3) * 130
The sequence of the operations is

If the selling price of a cooler is ₹ 11,200 and profit is 12 percent, then the purchase price of the cooler is

A cylindrical glass is of capacity 100 cubic centimetre. If the radius of the glass is increased by two times of the original radius of that glass, then the capacity of the glass will be

The missing number in the sequence 2, 6, 12, ___, 30 is

If two positive numbers are in the ratio 3 : 5 and their least common multiple is 105, then the numbers are respectively