The nine rules that win matches
Read one before every chase. Every question in this game uses one of these.
1 · Per cent means "per hundred"
25% just means 25 out of every 100. A strike rate of 150 is a percentage in disguise: 150 runs for every 100 balls.
2 · Know your fraction friends
These come up all the time. Learn them like your team's batting order.
3 · The 10% shortcut
To find 10%, move the decimal one place left. Build everything else from it.
4 · The multiplier method
Going up by p% means multiply by (1 + p/100). Going down means multiply by (1 − p/100). To undo it, divide.
5 · Percent change: divide by the OLD value
Change is always compared to where you started.
6 · Profit or loss % is always on Cost Price
CP = what the shop paid. SP = what it sold for. Profit = SP − CP. Then divide by CP, never by SP.
7 · Discount is always on Marked Price
MP is the price on the tag. Discount comes off MP. What you pay is the SP.
8 · Back-to-back changes multiply
Two changes in a row are not added. Multiply the multipliers.
9 · Mark up, then discount
Shops mark prices above CP, then give a discount. Work out the real SP, then compare to CP.
Match Day maths
Off-screen games for the family while India play. Needs a notebook, a pen, and the TV. Keep a running points table on the fridge for the whole series.
Predict the total
- Everyone writes down India's predicted first-innings score.
- After the innings, each person works out their % error: (difference ÷ actual score) × 100.
- Lowest % error gets 3 points. She checks everyone's working.
Boundary tracker
- Tally every 4 and 6 in the notebook as they happen.
- At the innings break: what % of the total came from boundaries? Compare both teams.
- Bonus: what % of balls faced were dot balls? (The TV often shows the dot-ball count.)
| Team | 4s | 6s | Boundary runs | Total | % |
|---|---|---|---|---|---|
| India | 18 | 6 | 108 | 288 | 37.5% |
| Opponent |
Example row: 18 fours + 6 sixes = 72 + 36 = 108; 108 ÷ 288 × 100 = 37.5%.
Beat the broadcaster
- The moment a batter is out, call out their strike rate (runs ÷ balls × 100) before the TV graphic shows it.
- Within 5 of the real figure = 1 point. Exact = 2 points.
- Rounding tip: 47 off 38 balls is a bit over 47 ÷ 40 ≈ 1.2, so about 120. Real answer 123.7.
Run-rate swing
- Note the score after over 10 and after over 20 (ODI) or after over 6 and over 20 (T20).
- Work out the run rate in each phase and the % change between them. Remember: divide by the first phase.
The snack-stall shop
- She runs the family snack stall. A parent is the "wholesaler" and sells her snacks at a cost price (use play money or a few coins).
- She sets a marked price, can offer a discount to a haggling customer, and must announce her profit % on every sale.
- Rule: if she quotes the profit % on SP instead of CP, the customer gets the snack free.
Win % table
- Keep India's results on the fridge sheet. After each match, update the win % and the change from last time.
- Question to ask her: "If India win the next one, what will the win % become?" Then check after the match.