If the length of a shadow of a pole on a level ground is twice the length of that pole, the angle of elevation of the sun is:-

Directions : What will come in the place of the question mark (?) in the following number series?

201, 199, 192, 175, 143, ?

A dealer bought an item at 10% discount on its original price. He sold it  at 35 % more than the original price. What percentage profit did he get?

Directions :- Read the given information carefully and answer the following questions.

There are four hostels i.e. A, B, C and D.

In hostel A: Number of boys are 120 and number of girls are 30% more than that of number of girls in

hostel B.

In hostel B: Number of boys are double than that of number of girls.

In hostel C: Number of boys are 100 more than that of boys in hostel A and total boys and girls in C is 1000.

In hostel D: Number of boys is 182 more than the number of boys in hostel A. Average of number of girls of hostel A and that of hostel D is 223.Number of boys in hostel D is 98 less that of boys in hostel B.

Total number of boys in hostel A and that of girls in hostel C is what percent more than number of boys in hostel B?

If 2sin²θ–5sinθcosθ+7cos²θ=1then possible values of tan θ are

The greatest value of $$ Sin^{4}θ+Cos^{4}θ $$ is:

What should come in place of the question mark (?) in the following question?
19.5% of 524 = 50% of ?