Verbal Reasoning - Mental Ability Questions

In the following question, correct the equation by interchanging two signs.
6 + 8 ÷ 4 – 4 = 8

Introducing a boy, Sia says, "He is the grandson of my father. I have no siblings." How is Sia is related to the boy?

If 6 @ 4 @ 7 = 101 and 2 @ 5 @ 11 = 150, then what is the value of A in A @ 8 @ 9 = 289?

In a row of boys, Rahul is 19th from top and Ajay is 21st from bottom. They interchange their position. Ajay now becomes 28th from bottom. Howmany total boys are there in the row?

Introducing a boy, Amar said, "He is the son of my maternal grandfather's son." How is that boy related to Amar?

Sumit's grandfather's brother is the father of Hemant's father. How is Sumit related to Hemant?

In the following question, select the missing number from the given series.
19, 26, 45, 71, 116, ?

If SPOON means PLATE, PLATE means BOWL, BOWL means GLASS and GLASS means SPOON, then what is used to drink water?