Interest on savings and cash machines
Tests: 5 of 11 right · Exam: 2 of 4 right · Kind: ★★ · Understood: 7 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 27 of the money course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.
Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.
Test 1 · ★★ · right ✓
Ella shouts, "Free money!" when the bank adds £3. Her brother says, "Nah, the bank's mugging you off somehow." ("Mugging you off" means tricking you.) Who's closer?
- 1. Ella: the bank pays interest because it uses her money while it's there — ← Mova's choice · ✓ the right answer · score 4
- 2. Her brother: the bank will charge her £3 later — no support
- 3. Neither: interest is only paid to grown-ups — score 4
- 4. Her brother: banks always secretly take money back — no support
Why: It took the question to ask which statement is true. It chose option 1 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 5, line 9: «China was the first country to use paper money, over 1,000 years ago.», reached through the option's own match among the sentences about the question's things. What matched: the same action «use» (+2); the same thing acted on «paper money» (+2). · the question and its options parsed, with trees and pragmatics
Test 2 · ★★ · right ✓
Your mate goes, "5% of £200 is £5, easy." Is he right?
- 1. No, it's £10, because 5% means £5 for every £100 — ← Mova's choice · ✓ the right answer · no support
- 2. Yes, 5% always means £5 — no support
- 3. No, it's £50, because 5 × 10 = 50 — no support
- 4. No, it's £205, because you add the 5 — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 3 · ★★ · right ✓
A cousin from the Highlands says, "Ma granny's savings went fae £100 tae £110, and the next year she got the 10% on the hale £110." ("Fae" means from; "tae" means to; "hale" means whole.) What does she have now?
- 1. £121 — ← Mova's choice · ✓ the right answer · no support
- 2. £120 — no support
- 3. £130 — no support
- 4. £111 — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 4 · ★★ · right ✓
What would happen if Grace left her money in for many more years at the same rate?
- 1. It would grow faster and faster, because of interest on interest — ← Mova's choice · ✓ the right answer · score 4
- 2. It would shrink back to £100 after a while — score 4
- 3. It would stop growing after two years — score 4
- 4. It would grow by exactly £10 every year for ever — score 4
Why: It took the question to ask what happens next. It chose option 1 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 23, line 1: «"We can't afford it" means there is not enough money left after the important things, like rent, food and bills; it is not a punishment, and it has nothing to…», reached through what followed the sentence the question matched. What matched: the same doer «money» (+4). · the question and its options parsed, with trees and pragmatics
Test 5 · ★★ · wrong ✗
Dad says, "Nah, £1.95 to take a tenner out? We'll find a free one." Your sister says, "It's only £1.95, chill." What's the point Dad is making?
- 1. Fees are paid by the bank, not by Dad — ← Mova's choice · no support
- 2. Machines with fees always steal your card — no support
- 3. The fee is nearly a fifth of the £10, which is a lot to pay for cash — ✓ the right answer · no support
- 4. Free machines give out more money than you ask for — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 6 · ★★ · wrong ✗
In a game, the cash machine gives you as much money as you like, even with £0 in your account. What's wrong?
- 1. Real machines also give unlimited money to anyone — ← Mova's choice · score 7
- 2. Nothing, as long as you know your PIN — no support
- 3. Real machines print new money for each customer — score 5
- 4. A real machine only gives money that is in your account — ✓ the right answer · score 7
Why: It took the question to ask which statement is true. It chose option 1 with score 7, tied with another option at 7 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 20, line 14: «A pension is money paid to people after they retire, built up from what they paid in while working.», reached through the remembered sentence the question matched. What matched: the same thing acted on «money» (+4); the same action «pay» (+3). The right option, 4, scored 7. · the question and its options parsed, with trees and pragmatics
Test 7 · ★★ · wrong ✗
Lucy forgets her card in the machine and moans, "Ugh, it ate my card, it's well peak." ("Peak" means bad luck.) Why did the machine keep it?
- 1. Because the machine was hungry for plastic that day — no support
- 2. To protect her, so nobody else could take it — ✓ the right answer · no support
- 3. Because she had no money at all left in her account — ← Mova's choice · score 4
- 4. To fine her for being far too slow at the screen — no support
Why: It took the question to ask why something happens (its cause). It chose option 3 with score 4, the only option with support. Its support: lesson 27, line 11: «Some cash machines charge a fee to take money out; taking out £10 with a £1.95 fee takes £11.95 from the account.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «money» (+3); the same doer «cash machines» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 8 · ★★ · right ✓
A grandad from Yorkshire says, "Interest is low, prices are up, me savings are going backwards, love." What does he mean?
- 1. Interest makes savings shrink when it is low — no support
- 2. His savings are being taken out by the bank each month — no support
- 3. Prices rising faster than interest means his money buys less — ← Mova's choice · ✓ the right answer · score 0
- 4. He has spent his savings on Yorkshire puddings — no support
Why: It took the question to ask what it is done to. It chose option 3 with score 0, the only option with support. Its support: lesson 27, line 15: «If prices rise faster than interest, savings buy less: at 2% interest £100 becomes £102, but a £100 toy rising 4% costs £104.», reached through the option's own match among the sentences about the question's things. What matched: the same action «rise» (+1); the same doer «prices» (+1); the same property (+1). Against it: one says «not», the other does not (counts against) (-3). · the question and its options parsed, with trees and pragmatics
Test 9 · ★★ · wrong ✗
Nina's mum says, "Locked for a year, but it pays 4%." She puts in £300 — no, £200. How much interest after a year?
- 1. £4 — ← Mova's choice · no support
- 2. £8 — ✓ the right answer · no support
- 3. £12 — no support
- 4. £204 — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 10 · ★★ · wrong ✗
Your big sister says, "Someone filmed my PIN? Nah, I don't need to cover the keypad, nobody's that sus." ("Sus" means dodgy.) What's the wise answer?
- 1. Only people with really big balances ever need to cover the keypad — score 1
- 2. Covering the keypad makes the machine refuse you — ← Mova's choice · score 7
- 3. She's right, nobody ever watches cash machines — no support
- 4. Always cover it, because cameras and nosy people can watch — ✓ the right answer · no support
Why: It took the question to ask which statement is true. It chose option 2 with score 7, against 1 for the next best. Its support: lesson 27, line 4: «A cash machine, or ATM, gives out cash from your account; you put in your card, cover the keypad while you type your PIN, and the money comes off your balance.», reached through the remembered sentence the question matched. What matched: the same thing acted on «keypad» (+4); the same action «cover» (+3). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 11 · ★★ · wrong ✗
Harry says, "Whatever, 5% or 3%, it's the same thing." On £200, how much more does 5% give than 3% in a year?
- 1. £2 — ← Mova's choice · no support
- 2. £10 — no support
- 3. £6 — no support
- 4. £4 — ✓ the right answer · no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · wrong ✗
It is given that the sum of £200 is deposited at an interest rate of five per cent per annum. Determine the interest accruing after one year.
- 1. £20 — ← Mova's choice · no support
- 2. £10 — ✓ the right answer · no support
- 3. £5 — no support
- 4. £100 — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 2 · formal language · wrong ✗
Ascertain the balance of a deposit of £100 after two years at ten per cent per annum, interest being compounded annually.
- 1. £110 — ← Mova's choice · no support
- 2. £120 — no support
- 3. £121 — ✓ the right answer · no support
- 4. £200 — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · right ✓
Which of the following statements most accurately characterises compound interest?
- 1. Interest calculated upon the principal together with interest previously accrued — ← Mova's choice · ✓ the right answer · score 8
- 2. A reduction of the balance in respect of rising prices — no support
- 3. Interest calculated exclusively upon the original sum deposited — no support
- 4. A charge levied by a bank in respect of each withdrawal — no support
Why: It took the question to ask who or what does it. It chose option 1 with score 8, the only option with support. Its support: lesson 24, line 15: «Paying back £6 for £5 borrowed is £1 extra, and £1 is one fifth of £5, which is a lot of interest for a small loan.», reached through the remembered sentence the question matched. What matched: the same thing acted on «lot» (+4); the same circumstance (+4). · the question and its options parsed, with trees and pragmatics
Exam question 4 · formal language · right ✓
Identify the course of action most consistent with prudence where an unfamiliar device is observed affixed to the card slot of a cash machine.
- 1. Abstention from use of the machine and notification of the bank — ← Mova's choice · ✓ the right answer · no support
- 2. Insertion of the card with exceptional rapidity — no support
- 3. Entry of the personal identification number on two occasions — no support
- 4. Removal of the device and retention of it by the customer as evidence — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
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