Verbal Reasoning - Mental Ability Questions

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

BILLIONAIRE

Select the odd figure out of the given series.

Select the related word/letters/number from the given alternatives.
DI : M : : CR : ?

If 70$7 = -10, 50$5 = -10 and 40$8 = -5, then find the value of 10$2 = ?

Ryaan is Vehaan's mother's sister's father's only son's son. How is Ryaan related to Vehaan?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
49, 64, ?, 100, 121

A man is facing west and he turns anti-clockwise by 90 degrees and moves 10m straight, then he again turns 90 degrees anti-clockwise. Which direction is the man facing now?

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

0.05, -0.1, ? , -0.4, 0.8