Number Concepts & Computation 2010

The number ninety-nine thousand, eight hundred and six is written as

• 90 9806

• 99 806

• 90 986

• 99 86

Which number, when rounded to the nearest hundred will be 800?

• 827

• 899

• 850

• 750

In which of the following situations would it be a good idea to round off numbers?

• when determining the outcome of the general elections

• when writing a cheque for the electric bill

• when recording statistics on world population

• When stating your age

What type of number is the product of 10 X 10 called?

• square number

• prime number

• triangular number

• double number

Which of the following best describes a prime number?

• a number with more than one factors

• a number that cannot be divided by two

• any number greater than one

• a number with only two factors

What is 24 written as a product of its prime factors?

• 2 x 2 x 3 x 3

• 2 x 2 x 2 x 3

• 2 x 12

• 1 x 24

Three factors of 36 are

• 2, 5 and 18

• 2, 3 and 8

• 3, 12 and 30

• 4, 9 and 12

Each person running in a race will get a card with a number on it. The remining runners will get numbers in the pattern below.

• 90

• 95

• 100

• 102

The sum of 3652 and 7419 is

• 3767

• 10061

• 11071

• 1010611

If n = 15, what is 115 + n?

• 115n

• 100

• 130

• 1725