General Oral Questions-Mathematics
How is 100,000 expressed as a power of 10
10 to the 5th power
What is meant by the root of a number
A root is 2 or more equal smaller numbers that, when multiplied together, equal the specified number
What is a proportion
A statement of equality between 2 or more ratios
Describe a trapezoid
A trapezoid is a closed, four-sided figure having 2 parallel sides and 2 sides that are not parallel
What is the formula for computing the area of a circle
Area = Pi R squared (Pir2)
What formula is used to find the area of a rectangle and of a triangle
Area = length times width for a rectangle (LxW) and Area = Base times height divided by 2 (1/2 BxH)
What are 2 different ways that a ratio may be expressed
As a fraction or by placing a colon between the 2 numbers
How do you convert a fraction into a percent
Convert it to a decimal, move the decimal point 2 places to the right and add the percent sign
What is a common method of making computations involving very large or very small numbers more manageable
Convert the numbers into scientific notation by using powers of 10
How do you convert a fraction into a decimal
Divide the top number (numerator) by the bottom number (denominator)
How can you convert a decimal into a percent
Multiply the decimal by 100 and add the percent sign. Or move the decimal point 2 places to the right and add the percent sign
How do you change a decimal into the nearest equivalent fraction
Multiply the decimal by the desired denominator. The result becomes the numerator in the fraction
How do you find the square of a number? Give an example
Multiply the number by itself. 4 times 4 = 16
Define Pi
Pi is a constant that expresses the relationship between the circumference of a circle and its diameter and is approximately equal to 3.14159265
Describe the result of adding a large positive number and a smaller negative number
The result is a smaller positive number, and is the same as ignoring the signs and subtracting the smaller number from the larger
How do you divide one fraction by another
You invert the divisor and multiply the numerators together and the denominators together
What is the key step that must be performed in order to add or subtract unlike fractions
You must find the lowest (least) common denominator