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Properties of Multiplication of Integers

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Question

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(−25) × 8 + (−25) × 2 = ?

(a) 250
(b) 150
(c) −250
(d) −150

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Solution

(c) −250

(−25) × 8 + (−25) × 2
= (−25) × (8 + 2) [Associative property]
= −250

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(−15) × 8 + (−15) × 2 = ?

(a) 150
(b) −150
(c) 90
(d) −90

Q. 40% of 150 + 60% of 150 =

(a) 200
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(d) 180

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A number increased by 20% gives 30. The number is

(a) 150
(b) 6
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A number decreased by 40% gives 135. The number is

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\frac{\sqrt[3]{128}}{\sqrt[3]{250}} = ?

\frac{3}{5}

\frac{4}{5}

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(d) none of these

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