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

52x14+145018=1998÷?

The price of a chair is Rs. 500. It has been sold at two succesive discounts of 10% each. What is its selling price?

In ∆ ABC, the height CD intersects AB at D. The midpoints of AB and BC are P and Q respectively. If AD = 8 cm and CD = 6 cm, then the length of PQ is?

A, B and C can work together for Rs. 550/- A and B together are to do 7/11 of the work. The share of C should be?

∆PQR is right angled at Q. If cosecP = 17/15, then what is the value of sinR ?

What is the value of (tan45° + 1/√2) ?

The side of an equilateral triangle is 8 cm. Find its area (in cm2).

If the line DE is drawn parallel to the base BC of a triangle ABC by intersecting the other two sides, then which of the following is the CORRECT equation for this case.

The smallest angle of a triangle is 40° less than the largest angle. If the largest angle is 80°, then find the third angle of the triangle