smc-676-15-Factors

Number, NAP-K3-CA38

Lucretia writes 1197 as the product of its prime factors correctly.

Which expression does Lucretia write?

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`3^2 xx 7 xx 19`

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`text(Prime factors require all factors to be)`

`text(prime numbers:)`

`:. 3^2 xx 7 xx 19,\ \ text{(can also be written as}\ \ 3xx3xx7xx19)`

Which of these numbers is a multiple of both 4 and 11?

`411`	`444`	`4114`	`4444`

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`4444`

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`text(Test if each option is divisible by both 4 and 11.)`

`4444/4 = 1111`

`4444/11 = 404`

`:. 4444\ text(is divisible by 4 and 11.)`

Which one of these has the same value as `16^2`?

`32^2 ÷ 4`	`2 xx 2 xx 4 xx 2 xx 4`	`2 xx 8^2`	`2 xx 16 xx 16`

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`32^2 ÷ 4`

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Which one of these numbers is a factor of 34?

`3`	`4`	`17`	`68`

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`17`

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`17`