What straight and level means?

Where did Leonardo de Pisa grow up? How many Vedas are there and what are their names? If a body falls freely under gravity, the gravitational acceleration will be equal to? In how many different ways can 4 items be arranged in a row? What is the answer to x plus 2x plus 14 equals 5x plus 2? 10 squared plus x equals 26 squared? Why starch is mixed near the end point? How much degrees is there in a trapezoid? What is 1777444 x 33? If you see eight numbers such as 01000101 grouped together and you are told these numbers represent the letter E what is this combination of numbers called? What conic sections represent a closed curve? What is a address line 1 mean? Is it justified to say that digital systems are unreliable and carries enormous risks? Are all squares similar explain? What does address line 1-2 mean? What would the time be at 5.pm on a 24 hour clock? What is the length of one side of a regular pentagon if its perimeter is 20 cm? What is 48 inches equal to how many feet? What is the word math when translated from English to Arabic? How do you determine if an angle is obtuse right or acute?