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3,750,000 is the same as __________.

• three and a half million

• three and a quarter million

• three and seven fifths million

• three and three quarter million

Which list of numbers represents only prime numbers?

• 9.11, 23, 31

• 2, 17, 29, 41, 43

• 5, 13, 49, 53

• 1, 7, 25, 37

4,506 is the same as _______.

• (4×10³) + (5×10²) + (6×10¹)

• (4×10³) + (5×10²) + (6×10⁰)

• (4×10⁴) + (5×10²) + (6×10¹)

• (4×10⁴) + (5×10³) + (6×10⁰)

How is the number 30 written as a product of its prime factors?

•  $6\times5$  

•  $2\times15$  

•  $2\times3\times5$  

•  $3\times10$  

Find the missing number in the sequence: 36, 25, 16, ___, 4.

• 7

• 8

• 9

• 10

 $3^2\times5^2=$ ______.

• 225

• 150

• 90

• 60

The product of an odd and an even number is always _________.

• prime

• even

• composite

• odd

 $\sqrt{9}+\sqrt{25}=$ ________.

• 34

• 8

• 7

• 6

If  $n$  is a whole number, then  $n\times n=$ ____________.

• a prime number

• a square number

• an even number

• an odd number

23,548 rounded to the nearest 1000 is _________.

• 23,000

• 23,550

• 23,500

• 24,000