John's answer to rahilah's Primary 5 Maths Whole Numbers Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
John
John's answer
22 answers (Tutor Details)
1st
.
rahilah
Rahilah
1 year ago
May i knw where 10 comes from?
John
John
1 year ago
Calculating for 5 years ago so total age minus 5 from each person = 10