Subject :IMO Class : Class 6
Sally is as old as David was 8 years ago. David is now (3x 2) years old. How old will Sally be 4 years from now?
A(3x - 2) years
B(3x - 10) years
C(3x - 6) years
D(3x - 8) years
david age is 3X-2
Ans 1:
Class : Class 10
Answer : C
Corrected the question. Minus sign was missing
Solution:
David's current age = 3x -2
David's age eight years before = 3x -2 -8 = 3x - 10
Sally's age = David's age eight years before = 3x -10
Sally's age after 4 years = 3x - 10 + 4 = 3x -6
Corrected the question. Minus sign was missing
Solution:
David's current age = 3x -2
David's age eight years before = 3x -2 -8 = 3x - 10
Sally's age = David's age eight years before = 3x -10
Sally's age after 4 years = 3x - 10 + 4 = 3x -6
Ans 2:
Class : Class 6