Question

An unchanging relation is given by the following star

If using the same unchanging relation, new star is formed an shown, then the value of a & b is equal to

• A. 11, 2
• B. 2, 11
• C. 9, 3
• D. 3, 9

Answer 1

The correct option is A

11, 2

We can observe the given unchanging relation is

9 + 2 = 11 (up)

9 - 2 = 7 (down)

using the same we get

a + b = 13

a - b = 9

adding we get

(a + b) + (a - b) = 13 + 9

2a = 22 [x + (y + z) = x + y + z]

a = 11

Subtracting we get

(a + b) - (a - b) = 13 - 9

a + b - a + b = 4 [x - (y - z) = x - y + z]

2b = 4

b = 2