If 70% of ‘y’ is 25% more than 30% of 140, then value of ‘y’ is:
If x + y = 12 and x² + y² = 74, find xy.
Two positive numbers differ by 2, and the sum of their reciprocals is 3/4. What is the larger number?
If √b + (1/√b) = 8, then find the value of b + (1/b).
If the seven-digit number 94x29y6 is divisible by 72, then what is the value of (2x+3y) for x ≠ y?
If √m + (1/√m) = 7, then find the value of m + (1/m).

If P3 + 3P2 + 3P = 7, then the value of P2+ 2P is –
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- If x² - 2x + 1 = 0, then find the value of (x + x⁻¹)².