UP Police SI · Numerical & Mental Ability
Linear and quadratic equations, identities.
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Q1 · Algebra · EASY
If 3x + 7 = 22, then what is the value of 2x + 5?
Q2 · Algebra · EASY
The sum of two numbers is 50 and their difference is 10. What is the product of the two numbers?
Q3 · Algebra · MEDIUM
If x^2 - 5x + 6 = 0, then what is the value of x^2 + 1/x^2?
Q4 · Algebra · MEDIUM
If a and b are the roots of the equation 2x^2 - 7x + 3 = 0, then what is the value of (1/a + 1/b)?
Q5 · Algebra · MEDIUM
If 3x + 5y = 41 and 5x + 3y = 39, then what is the value of x + y?