Verbal Reasoning - Mental Ability Questions

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

If "-" means "plus", "x" means "divided by", "÷" means "multiply" and "+" means "substraction", then

In a certain code language, 'x' represents '+', '÷' represents 'x', '-' represents '÷' and '+' represents '-'. Find out the answer to the following question.

18 - 2 + 20 x 10 ÷ 4 = ?

If BORDER is coded as 579649, then ORDER can be coded as

How many triangles are there in the given figure?

Four words have been given below of which three are alike in some way and one is different. Choose the odd one out.

Kritika walks 40 metres towards south. Then turning to her right she rides 30 metres. Then, turning to her left, she rides 50 metres. Again, she turns toher left and rides 30 metres. How far (in metres) is she from her initial position?

If LOW is coded as 468, BOW as 768, and SOWS as 3683, then the code of BOWLS is