Verbal Reasoning - Mental Ability Questions

If + means division, ­ means multiplication, '÷' means subtraction, x means addition, and < means less than, then which of the following is false?

Which of the following diagram represents the relationship among Tall men, Black haired, Indians?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a _ bc _ a _ bcdabc _ da _ cd _

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Biological

How many triangles are there in the given figure?

While posing for a family photo, the father is standing to the right of the son and left of the grandmother. The mother is sitting to the left of her daughter and right of the grandmother. Who is seated in the middle?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

2, 3, 7, 16, ?