Ng Bee San's answer to Xeno's Primary 6 Maths Data Analysis Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Ng Bee San
Ng Bee San's answer
166 answers (Tutor Details)
1st
For irregular patterns, find formula for even n with constant difference. Remember to use n/2 instead of n. Use the answer of even n to adjust one step to odd n.