What value should come in place of the question mark (?) in the following question?

52x14+145018=1998÷?

If sinθ+ cosecθ=2, then the value of sin-7∅+cosec7∅ is

Length of three line segments isgiven. Is construction of a triangle possible with the segments in the given cases?

From an external point two tangents to a circle are drawn. The chord passing through the points of contact subtends an angle72° at the centre. The angle between the tangents is?

If x+3y=-3x+y, then x22y2 is equal to

If a2+1=a, then the value of a3 is

A train 240 meters in length crosses a telegraph post in 16 seconds. The speed of the train is?

In a Village panchayat society 574 names are enlisted as 'below poverty level'. If 14% of the villagers are below poverty level, the total number of villagers is?

The percent profit made when an article is sold for Rs. 78 is twice as much as when it is sold for Rs. 69, the cost price of the article is?