Elitmus Exam Logical Reasoning Cryptography

In elitmus do they ask division problems also or only multiplication and addition??
Please help. I have exam on coming sunday

Read Solution (Total 13)

Elitmus Other Question

Verbal
Problem Solving
Quantitative
15.00
60.00
45.0

21.70
95.43
89.43
what are my chance to get inteview call ? please tell
Let x = √4+√4-√4+√4-....infinity

then x equals:
A. 3
B. (√13 - 1)/2
✓C .(√13 + 1)/2
D.√13

Please Explain.