Class X

Factorial of a positive integer n is
  1. nι = n(n-1)ι(n-2)ι
  2. nι = n(n+2)ι
  3. nι = (n-2)ι
  4. nι = n(n-1)ι
 If 4x is side length of square then area of region is
  1. (4-π)x²
  2. 2(4-π)x²
  3. 3(4-π)x²
  4. 4(4-π)x²
1° =
  1. 1 radian
  2. 0.01745 radian
  3. 0.5 radian
  4. 2.5 radian
 If sinθ = 1/√2, then θ is
  1. 60°
  2. 30°
  3. 180°
  4. 45°
A.M between 1-x+x² and 1+x-x² is
  1. 4
  2. 3
  3. 2
  4. 1
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