General Aptitude · topic
Ratios, proportion and percentages as multipliers; successive change, profit, loss, discount and interest; averages, mixtures, work, speed and ages as applications; exponent and logarithm rules, digit counts, unit digits and honest estimation.
The quantitative engine of GA: ratios and proportion (combining ratios, dividing in a ratio, direct and inverse proportion, partnership), percentages as multipliers, successive change, undoing a change, profit, loss, marked price and discount, simple and compound interest with the two- and three-year difference formulas, compounding periods, and the fraction-to-percent table used for estimation. Every example is original and recomputed by script.
A partial preview of the top of the sheet. The full sheet is in the General Aptitude cheat sheet pack.
Ratio and percentage applications that GA word problems use: averages through totals (corrections, newcomers, consecutive numbers), weighted averages, mixtures by alligation and repeated replacement, work and pipes as added rates, man-days, wages, speed, average speed, relative speed for trains and circular tracks, boats and streams, late-early problems and ages. Original examples, every number recomputed by script.
A partial preview of the top of the sheet. The full sheet is in the General Aptitude cheat sheet pack.
Exponent laws with their conditions, fractional and negative exponents, surds and rationalising, comparing large powers by a common base or exponent, solving exponential equations, logarithm laws and domain, change of base, the four logarithm values worth memorising, digit counts and leading zeros, unit-digit cycles, doubling and half-life, and estimation with a stated error. Original examples, every number recomputed by script.
A partial preview of the top of the sheet. The full sheet is in the General Aptitude cheat sheet pack.
