1032 – 972/200 is equal to

103² – 97²/200 is equal to

(a) 3

(b) 4

(c) 5

(d) 6

Answer : (d) 6

Hint:

103²-97²/200 = (103+47)(103-97)/200 = 200×6/200 = 6

Question 6. If x + y = 11 and xy = 24, then x² + y² is equal to

(a) 121

(b) 73

(c) 48

(d) 169

Answer : (b) 73

x + y = 11, xy = 24 (x+y)² = 11² => x² + y² + 2 × 24 = 121

x² + y² = 73

More Solutions:

• Find the value of 8×3 – 27y3 + 90xy + 125.
• If a2 – 1/a2 = 5, evaluate a4 + 1/a4
• Find the relation between p and q.
• Find the value of 2a3 + 2/a3
• If x = 1/(4 – x), find the value of
• Find the value of ¼ (x3 – 1/x3)
• Find the value of x3 – 1/x3
• Find the value of x3 – 1/x3
• Find the sum of their squares.
• If a – b = 7 and a3 – b3 = 133, find:
• Find the coefficient of x2 expansion of