The angle of elevation of the top of a tower from two points A and B lying on the horizontal through the foot of the tower are 159 and 30° respectively. If A and B are on the same side of the tower and AB = 48 meter, then the height of the tower is; 

There are two temples, one on each bank of a river just opposite to each other. One temple is 54m high. From the top of this temple, the angles of depression of the top and the foot of the other temple are 30° and 60° respectively. The length of the other temple is; 

The number of pairs of positive integers whose sum is 99 and HCF is 9 is: 

A General of an Army wants to create a formation of square from 36562 army men. After arrangement, he found some army men remained unused. 

If the product of three consecutive numbers is 210 then the sum of the smaller numbers is: 

The greatest number that divides 411, 684, 821 and leaves 3, 4 and 5 as remainders, respectively, is 

If the product of three consecutive numbers is 210 then sum of the smaller number is: 

Find the greatest number that will divide 390, 495 and 300 without leaving a remainder.