civil services
for SSC
maths formulae
maths shortcut square
shortcut tricks of time and work
simplification
speed mathematics
- certificate physical and human geograpgy by GOHCHENGLEONG
- chronicles ias academy notes
- Norman Lewis - Word Power Made Easy (Fully Revised & Expanded)
- wren & martin -book and solution
for SSC
maths formulae
maths shortcut square
shortcut tricks of time and work
simplification
speed mathematics
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