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