iain rennie quiz

[granny grump]

Still a few more to go but would like confirmation of one and help with another on 'what comes next' please

15. 1000,250,111.1, 62.5. I have sen the answer 62.5 but don't know why - I do like to understand the answers.

16. 5 10 15 20 is it as simple as 25 increasing by 5 each time?

Many thanks

[Fibonacci]

15 One possible explanation
1000 / 1 = 1000
1000 / 4 = 250
10000 / 9 = 111.1......
1000/16 = 62.5
and then
1000/25 = 40
i.e Dividing 1000 by square numbers

16. Does appear to be simply add 5.