n³ + 7n + 3 is divisible by k for all natural numbers n. Then k is ..........

The distance between the parallel lines 4x − 3y + 5 = 0 and 4x − 3y − 2 = 0 is

Which of the following is not a statement?

In order to show that √7 is irrational by method of contradiction we assume that ..........

The area of a triangle with vertices (0,0), (3,3) and (−3,3) is .........

A hall is 5 m long, 4 m wide and 3 m high. What is the cost of white washing its walls and roof at a rate ₹25/m² and laying of marble floor at a made. (question text incomplete as printed)

In a linear programming problem, the number of minimum (or maximum) points attained by an objective function can be ..........

A park is 25 m long and 21 m wide. A 2 m wide path is to be laid in the middle of the park parallel to length and breadth. What is the cost of laying the path if it costs ₹ 20 per sqm.

A building contractor employs 20 males, 15 females and 5 child workers. To a male worker he pays ₹25 per day, to a fermale worker ₹ 20 per day, to a child worker ₹ 8 per day. What is the average wage per day paid by the contractor?