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

52x14+145018=1998÷?

If A is 50% more than B, then B is what percent of A?

If four angles of a quadrilateral are (6x-18), (80-4x), (4x+14), (12x-58), then find the value of the smallest angle of the quadrilateral.

If X2+4y2+z2-4x-2z+5-0, then find the value of y15+x5z14

When a number is divided by 63 the remainder is obtained as 26. What will be the remainder when the number is divided by 3?

If x stands for addition, / stands for subtraction, + stands for multiplication and - stands for division, then what is the value of 20 x 8 / 8 - 4 + 2 ?

The volume (in cu.cm.) of a right circular cylinder with radius 1 cm and height 2 cm is: pi = 22/7

Complete the analogy 3 : 11 :: 7 : ___

Each exterior angle of a regular polygon measures 9 deg. How many sides does the polygon have?