West Bengal Police Constable Special Mock Test
Mathematics - Surds and Indices
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1) If x^(1/2) + x^(-1/2) = 5, then find x + 1/x.
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2) Find the value of (27^(1/3) * 8^(1/3))^3.
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3) What is the square root of 25?
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4) If x = √(5 + √21), then the value of x + 1/x is:
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5) What is the value of 7^2?
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6) If (2√x + 3)^2 = 25, find x.
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7) Which of the following is equal to (27^(1/3))^2?
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8) If 4^x = 128, find the value of x.
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9) What is the value of 15^2?
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10) Simplify the expression (√12 + √8)/(√12 - √8).
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