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## 'Odds, Evens and More Evens' printed from http://nrich.maths.org/

For Alison's approach:

What happens to the numbers as you go down the rows?

What happens as you go up the rows?

For Bernard's approach:

Which numbers end in a 0 in row $A_2$?

Which numbers end in a 0 in row $A_3$?

Which of these sequences will hit 1000?

For Charlie's approach:

Can you find a similar method to Charlie's to describe the other rows?

Which descriptions include 1000?