Speed of boat in upstream is 11km/hr and downstream is 23 km/hr find the speed of boat in still water?

12 men can complete one-third of the work in 8 days. In how many days can 16 men complete that work?

Directions:  In the following two equations questions numbered (I) and (II) are given. You have to solve both equations and
Give answer
(a) If x > y
(b) If x ≥ y
(c) If y > x
(d) If y ≥ x
(e) If x = y or no relation can be established

$$ {I.2x^{2}+x-28=0}$$
$$ {II. 2y^{2}-23y+56=0}$$

If 2x + 3y - 5z = 18 , 3x + 2y + z = 29 and x + y + 3z = 17 , then what is the value of xy + yz + zx ? 

A trader sells his goods at a discount of 20 %. He still makes a profit of 25 %. If he sells the goods at the marked price only. His profit will be 

A copper wire is bent in the shape of a square of area 81 cm². If the same wire is bent in the form of a semicircle, the radius (in cm) of the semicircle is (take π=22/7 ) 

The number of integers in between 100 and 600, which are divisible by 4 and 6 both, is: