Mr Issac used to like puzzle his students now and then. One day he wrote following message on board and asked students to guess topic of discussion:
XVXRY XCTXXN HXS XQXXL XND XPPXSXTX RXXCTXXN
Can you guess the topic
2+3=8,
3+7=27,
4+5=32,
5+8=60,
6+7=72,
7+8=??
Can you Solve it? Explain how!
