How is compound interest calculated?+
Multiply the balance by (1 + rate) once per year: $1,000 at 5% for two years is $1,102.50. The second year pays interest on $1,050 rather than $1,000, and that $2.50 is the whole difference from simple interest. The gap is driven by years more than by rate — at 8% over ten years, $1,000 compounds to $2,158.92 against $1,800 simple.
How long does it take to double your money at 7%?+
Eleven whole years at 7% a year with interest added annually. 1.07 to the tenth is 1.97, just short of double, and only the eleventh year clears 2.0. The rule of 72 estimates 72 ÷ 7 ≈ 10.3 years, so it reads a year optimistic here; it is a mental shortcut that is closest around 8%.
Is buy one get one half price a good deal?+
It is 25% off the pair, not 50%. Two $60 items cost $90 together, so each one effectively costs $45 — the same as a plain quarter-off sale and worse than any discount deeper than that. It only holds if you wanted both items anyway; one item at full price beats two at 25% off when the second one goes unused.
How much should an emergency fund be?+
Size it on monthly spending rather than income, and pick the number of months yourself: at $5,000 a month, six months is $30,000. A steady job needs less cover than a variable one. Keep it somewhere it can be withdrawn quickly and without penalties, because money you cannot reach on the day it is needed is not doing this job.
What does inflation do to money in a savings account?+
At 3% a year, $1,000 left as cash buys after ten years what $744.09 buys today. The number in the account is unchanged, so the loss is invisible on a statement. Years matter more than the rate: at 5% for fifteen years, $10,000 is down to $4,810.17 in today's prices.
What does APR mean on a loan?+
It is one year of borrowing cost, fees included, expressed as a single percentage. Two offers with the same monthly payment can carry very different APRs once fees are counted, so the payment on its own says nothing about the price. The quickest check on an instalment plan is total repaid minus amount borrowed: $900 a month for twelve months on $10,000 borrowed costs $800.
What is the 50/30/20 budget rule?+
It splits take-home pay into 50% needs, 30% wants and 20% savings and debt repayment: on $8,000 a month that is $1,600 saved. The common slip is applying it to gross pay — with $10,000 gross and $2,200 of deductions, the budget is built on $7,800. The 20% is a target to aim at rather than a threshold that means anything on its own.
What games can you play to learn about money?+
Quiz-style browser games are the practical answer: a round takes a few minutes, needs no signup, and a wrong answer shows the correct one with a short explanation instead of just a cross. Finance Football is one of them — up to sixteen questions on compound interest, discounts, budgeting, borrowing costs and scam signals, dealt as four attacking drives with a 20-second clock on each question.