Which of the following numbers is not a prime number?
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The sum of digits of a two-digit number is 9. When the digits are reversed, the number decreases by 45. Find the changed number.
If x=2+32-3, then what is the value of x+1/x ?
Find the volume (in cm3) of a cube of side 7.5 cm.
If (x – 2)2 + (y + 3)2 + (z – 15)2 = 0, then what is the value of x + y + z – 5?
3cosA is equal to
A = (x8 – 1)/(x4 + 1) and B = (y4 – 1)/(y2 + 1). If x = 2 and y = 9, then what is the value ofA2 + 2AB + AB2?
What is the value of sec 4π/3?
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