help on maths question please

[SleepyHead]

The number of insects in a colony doubles each week. If there were 100 insects in the colony at the start of the first week,

(a) how many would there be after 6 weeks ?

Confused as to whether the answer is 3200 in the 6th week or 6400 at the start of the 7th week. With the wording saying after 6 weeks, I'm not sure which one it would be

thanks in advance
SleepyH

[solimum]

Badly worded, but "after six weeks" implies six lots of doubling so I would go for 6400

https://pbs.twimg.com/media/ETwOmI6XYAA8C2k.jpg

[SleepyHead]

Thank you

[Surferfish]

It depends on in which week the insects are told to self isolate...(and whether or not they take any notice)

(in answer to your question I would agree that its 6400. 'After 1 week' it would be 200, not still 100. After 2 weeks 400 etc)