Verbal Reasoning - Mental Ability Questions

From the given alternative words, select the word which cannot be formed using the letters of the given word. SPECULATION

If 75$26 = 4, 69$53 = 7 then what is the value of 82$46 = ?

If SELFIE = LXEYBX, then PHYSICS = ____

Arrange the given words in the sequence in which they occur in the dictionary.
i. Forehead
ii. Forensic
iii. Forest
iv. Foremost

Choose the related word/letters/number from the given alternatives. RARE : ERAR : : ROCKET : ?

If 10$25 = 8, 12$25 = 10 then what is the value of 14$53 = ?

Which word comes first in the dictionary?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_cca_a_ca_ac_ab