In case of all online papers (KVPY, JEE mains, BITSAT, VITEEE, JEE Adv.....) they will provide you with either as per requirement rough pages (non ruled) or single scribble pads (in BITSAT and Adv) which are sufficient for the test.
For the offline ones the space provided on each page and the few pages at the end are sufficent.
Log table for not provided in the last year for the national level tests...
but we could ask for one in the MHTCET (Maharashtra entrance...) and CBSE boards as well
If required the values of the logs are provided in the question itself and all the necessary constants (refer the previous yrs papers)