Verbal Reasoning - Mental Ability Questions

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

PHOTOSYNTHETIC

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

12, 24, 72, 288, ?

Find the odd word/letters/number pair from the given alternatives

In the following question, select the related number from the given alternatives.
48 : 63 : : 80 : ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

12 x 6 ÷ 5 + 4 = ?

How many triangles are there in the given figure?

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

S, Q, N, J, ?

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

p_r_s_q_p_rs