I had solved half of 5lb book and I felt the Quants was okay, not too easy or difficult. I started solving Big Book and the quants section seems to be very easy. Did GRE quants became tough lately?
Big book is outdated when it come to quants concepts but its still gold for verbal, although a point to notice is that calculator was not provided during those days .
So there’s no point in solving quants from Big Book?
You can increase the difficulty. 30 question in 20 mins and no calculator and then check your accuracy
Try solving it following the instructions: 30 questions in 30 minutes no calculator. Don’t underestimate Big Book. It’s quite helpful for concepts.