Quick Tricks & Formulas
- SI: SI = (P × R × T) / 100 and Amount A = P + SI
- Rate in SI: R = (SI × 100) / (P × T)
- CI: A = P(1 + R/100)^T and CI = A − P
- Rate in CI: R = ( (A/P)^(1/T) − 1 ) × 100 where A = P + CI or “becomes amount”
3 questions per row • Select an option → answer + trick/shortcut + full explanation.