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The purchasing power of currency is the quantity of goods and services that can be bought with a monetary unit.
If x + y + z = 9 and (x2 + y2 + z2) = 21, then find the value of (xy + yz + zx)
Which of the following statements is correct?
I. If x = 12, y = –2 and z = –10, then x³ + y³
+ z³ = 720
II. If x + y = 48 an...
If (r + s + t) = 12 and (rs + st + tr) = 60, then find the value of (r² + s² + t²).
If 9 : 12 :: 12: x, and 28: 42:: 42: y, then the value of 2x + y is:
If x – 1/x = 9, then x3 – 1/x3 is:
47.98 × 4.16 + √325 × 12.91 + ? = 79.93 × 5.91
If {x + (1/x)} = 4, then find the value of {x2 + (1/x2)}
A boat covers a distance of 75 km downstream in 2.5 hours. If the ratio of upstream speed to downstream speed of the boat is 3:5, then find the distance...
A certain number of students from school X appeared in an examination and 30% students failed. 150% more students than those from school X, appeared in ...
if a2 + b2 + c2 = 2(4a -5b -9c)-122 , then a-b-c = ?
