सराव प्रश्नसंच -1

1) \[\left ( -1 \right )^{7}\times \left ( -1 \right )^{5}\times \left ( -1 \right )^{4}\times\left ( -1 \right )^{2}=?\]

1. 18
2. -1
3. 1
4. यापैकी नाही

Answer: 1

Explanation: #

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2) \[2^{3}\times 2^{0}\left ( 4^{0}-3^{0} \right )=?\]

1. 0
2. 1
3. 8
4. 16

Answer: 0

Explanation: #

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3) \[\: \: 8^{2}\times 8^{1}\times 8^{0} =?\]

1. 64
2. 512
3. 8⁶
4. 216

Answer:512

Explanation: #

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4) \[\: \: \left ( \frac{-2x^{2}}{3y} \right )^{3}\: \: =?\]

1. \[\frac{-8x^{6}}{27y}\]
2. \[\frac{8x^{6}}{27y^{3}}\]
3. \[\frac{-8x^{6}}{27y^{3}}\]
4. यापैकी नाही

Answer: \[\frac{-8x^{6}}{27y^{3}}\]

Explanation: #

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5) \[0.00081=3^{4}\times 10^{x}\: ,\: \: \: x= ?\]

1. 5
2. 4
3. -5
4. -6

Answer: -5

Explanation: #

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6) \[\frac{5^{3}\times 3^{3}}{15^{2}}= ?\]

1. 3
2. 5
3. 45
4. 15

Answer: 15

Explanation: #

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7) \[\left [ \left ( \frac{3}{4} \right )^{2} \right ]^{-3}\: \: = \left ( \frac{4}{3} \right )^{x}\: \: \: \: x=?\]

1. -6
2. 6
3. 4
4. 5

Answer: 6

Explanation: #

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8) \[\frac{6^{4}\times8^{2}\times27^{2} }{6^{6}\times2^{4}\times3^{3}}=?\]

1. 0
2. 1
3. 15
4. 3

Answer: 3

Explanation: #

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9)\[12500=5^{3}\times 10^{x} , \: \: \: \: \: x=?\]

1. -2
2. -3
3. 2
4. 3

Answer:2

Explanation: #

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10)\[6400=0.3^{3}\times 10^{x} , \: \: \: \: \: x=?\]

1. 5
2. 6
3. 4
4. 2

Answer: 6

Explanation: #

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