Question

solve this as fast as you can?​

Answer 1

Solution

• 1st Block = a
• 2nd Block = b
• 3rd Block = c
• 4th Block = d

→ a + b = 8 __(1)

→ c - d = 6 __(2)

→ a + c = 13 __(3)

→ b + d = 8 __(4)

Since value of (1) and (4) is same,

→ a + b = b + d

→ a = d

In eq(3) by substituting value,

→ d + c = 13 __(5)

→ c - d = 6 __(2)

On adding (5) and (2) we get,

→ c = 19/2

Hence d = 13 - 19/2

→ a = d = 7/2

Hence b = 8 - 7/2

→ b = 9/2