how much % should be there in b.tech to write gre and max backlogs

Hi, Yes, you may surely take GRE test, as in order to take this test you need to have undergraduate degree and there are no restrictions based on age or percentage of marks. GRE is a test which need to be taken by students who wish to pursue masters degree in science and engineering fields from

GRE can be written irrespective of whatever your percentage or arrears is in University. There is no pre-requisite of getting a certain percentage to write GRE.