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Prime Factors

The number ...

Question

The number $90$ is to be written as a product of its prime factors. Which one of the following is correct?

90 = 2 \times 5 \times 9

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90 = 2 \times 3 \times 3 \times 5

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90 = 3 \times 5 \times 9

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90 = 4 \times 5 \times 9

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Solution

The correct option is B $90 = 2 \times 3 \times 3 \times 5$
$90 = 2 \times 3 \times 3 \times 5$
$= 2 \times 3^{2} \times 5$

Suggest Corrections

Similar questions

90

1 + 2 + 3 + 3 + 4 + 6 + 5 + 6 + 9 +

25 x^{2} - 90 x y + 81 y^{2}

[(90+4)÷2- 6×6÷2+{(7+4)×10}+8×9- 5]×10+8

9

27

1

2

= (9 - x)

∴

= 10 \times (9 - x) + x \Rightarrow 90 - 10 x + x = (90 - 9 x)

3

27

90 - 9 x

117 - 9 x

4

10 x + (9 - x) = 9 x + 9

5

117 - 9 x = 9 x + 9

6

= 6

= 3

7

= 36

Evaluate: [(90 + 4) $\div$ 2 – 6 $\times$ 6 $\div$ 2+ {(7 + 4) $\times$ 10} + 8 $\times$ 9 – 5] $\times$ 10 + 8

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