Laptop for a student, which specs is better?

1) Lenovo S21e Laptop: Processor
Intel Celeron N2840 processor(2.16GHz 1333MHz 1MB), Operating system
Windows 8.1 with Bing 64, Total memory
2.0GB PC3L-12800 DDR3L 1600 MHz
Hard drive device 32GB

2) ASUS X551CA: Processor Intel Celeron 2830U, operating systemWindows 8.1, processor speed2.1 GHz, memory4 GB, hard drive capacity 500 GB,

3) Acer: Intel® Celeron® Quad Core processor N2930
(1.83 GHz with TurboBoost up to 2.17Ghz, 2 MB L3 cache)
Windows 8.1
11.6" HD Acer LED-backlit TFT LCD
Intel® HD Graphics
2GB RAM, 500GB HDD

all 3 have 3 year warranty. Laptop 1 cost $339, laptop 2 cost $349, laptop 3 cost $499.

maybe could you rank it in order from best to worst. I just need a laptop for school work.

Acer: Intel® Celeron® Quad Core processor N2930 (1.83 GHz with TurboBoost up to 2.17Ghz, 2 MB L3 cache) - Windows 8.1 - 11.6" HD Acer CineCrystal™ LED-backlit TFT LCD - Intel® HD Graphics - 2GB RAM, 500GB HDD, ASUS X551CA: Processor Intel Celeron 2830U, operating systemWindows 8.1, processor speed2.1 GHz, memory4 GB, hard drive capacity 500 GB, 3),1) Lenovo S21e Laptop: Processor Intel Celeron N2840 processor(2.16GHz 1333MHz 1MB), Operating system Windows 8.1 with Bing 64, Total memory 2.0GB PC3L-12800 DDR3L 1600 MHz Hard drive device 32GB 2)

I don't know

All these Celerons are snaily, but the Acer is way better then the others. On bench tests, that N2930 scores 1700. The others are real slow at 1000. The AMD at TigerDirect scores a paltry 860.
If you can spend $500, I'd look for one with an Intel processor, at least the i3, preferably an i5.
https://www.cpubenchmark.net/..._cpus.html

I would really suggest you the acer as i own one its superb doesn't lag and satisfactory for your school work moreover your getting 4 gigs of ram so it no worries of speed