A girl saves money over 200 weeks. She saves 5p in Week 1, 7p in Week 2, 9p in Week 3, and so on until Week 200. Her weekly savings form an arithmetic sequence. Find the amount she saves in Week 200. Calculate total savings over the 200 week period.

In part (a) the majority obtained 403 and some wrote their answer as £4.03, there was the usual crop of arithmetic errors with 2 ×199 = 298 or 498 being quite common. In part (b) the sum formula was usually quoted and used correctly but again arithmetic slips (e.g.408 ×100 = 4080 or 10 + 398 = 418 or 498) were often seen and some made errors with the units giving the answer as £40800. 

SS
Answered by Selena S. Maths tutor

7904 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

(Core 2) Show that the region bounded by the curve y = 7x+ 6 - (1/x^2), the x axis and the lines x = 1 and x = 2 equals 16


How do I integrate 2^x?


What are logarithms and how do you manipulate them?


Given that f(x)= (3+x^2)(x^1/2-7x). Find f'(x) (5marks)


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning