Pocket money calculations on the calculator
Pocket Money calculations worksheet 1
Complete the missing information in the table and answer the follow-up questions.
Penny
Penny gets £1 pocket money in the 1st week, then £1 more in the 2nd week (£2), and £1
more in the 3rd week (£3) and £1 more each week after.
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 2 3 4
Total so far (£) 1 3 6
a. When does Penny’s total pocket money become more than £50? (if she saves it all)
b. In which week does Penny first get £50 for the week?
c. When does Penny’s total pocket money become more than £100? (if she saves it
all)
d. In which week does Penny first get £100 for the week?
e. Does Penny get twice as much pocket money in the 10th week as the 5th?
f. Does Penny have twice as much total pocket money in the 10th week as the 5th
week?
g. How long would it take before Penny gets a million pounds for the week (in
years)?
Pocket Money calculations worksheet 2
Complete the missing information in the table and answer the follow-up questions.
Bob
Bob gets £1 pocket money in the 1st week, then £10 more in the 2nd week (£11), and £10
more in the 3rd week (£21) and £10 more each week after.
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 11 21 31
Total so far (£) 1 12 33
a. When does Bob’s total pocket money become more than £100? (if he saves it all)
b. In which week does Bob first get more than £100 for the week?
c. When does Bob’s total pocket money become more than £1000? (if he saves it all)
d. In which week does Bob first get more than £1000 for the week?
e. Does Bob get twice as much pocket money in the 10th week as the 5th?
f. Does Bob have twice as much total pocket money in the 10th week as the 5th
week?
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Pocket money calculations on the calculator
Pocket Money calculations worksheet 3
Complete the missing information in the table and answer the follow-up questions.
Millie
Millie gets £1 pocket money in the 1st week and £1 in the 2nd week. Then in the 3rd week
she gets £1 + £1 = £2, and in the 4th week £1 + £2 = £3, and in the 5th week £2 + £3 = £5,
and so on, always receiving the sum of the previous 2 weeks as pocket money the week
after.
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 1 2 3 5
Total so far (£) 1 2 4 7
a. When does Millie’s total pocket money become more than £100? (if she saves it
all)
b. In which week does Millie first get more than £100 for the week?
c. When does Millie’s total pocket money become more than £1000? (if she saves it
all)
d. In which week does Millie first get more than £1000 for the week?
e. Does Millie get twice as much pocket money in the 10th week as the 5th?
f. How long would it take before Millie gets a million pounds for the week?
Pocket Money calculations worksheet 4
Complete the missing information in the table and answer the follow-up questions.
Mr Moneybags
Mr Moneybags gets £1 pocket money in the 1st week, then double in the 2nd week (£2),
and double again in the 3rd week (£4) and double each week after.
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 2 4 8
Total so far (£) 1 3 7
a. When does Mr Moneybags’ total money become more than £100? (if he saves it all)
b. In which week does Mr Moneybags first get more than £100 for the week?
c. When does Mr Moneybags’ total money become more than £1000? (if he saves it
all)?
d. In which week does Mr Moneybags first get more than £1000 for the week?
e. What do you notice about the week’s money and the total so far?
f. In the 15th week Mr Moneybags gets £16,384. What will his total be?
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Pocket money calculations on the calculator
Answers
Penny
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 2 3 4 5 6 7 8 9 10 11 12
Total so far (£) 1 3 6 10 15 21 28 36 45 55 66 78
a. Week 10
b. Week 50
c. Week 14
d. Week 100
e. Yes
f. No
g. 1,000,000 weeks = 19,178 years
Bob
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 11 21 31 41 51 61 71 81 91 101 111
Total so far (£) 1 12 33 64 105 156 217 288 369 460 561 672
a. Week 5
b. Week 11
c. Week 15
d. Week 101
e. No
f. No
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Pocket money calculations on the calculator
Millie
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 1 2 3 5 8 13 21 34 55 89 144
Total so far (£) 1 2 4 7 12 20 33 54 88 143 232 376
a. Week 10
b. Week 12
c. Week 15
d. Week 17
e. No
f. 31 weeks
Mr Moneybags
Week Number 1 2 3 4 5 6 7 8 9 10 11 12
Week’s Money 1 2 4 8 16 32 64 128 256 512 1024 2048
Total so far (£) 1 3 7 15 31 63 127 255 511 1023 2047 4095
a. Week 7
b. Week 8
c. Week 10
d. Week 11
e. It’s double minus one
f. £32,767
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