Ans to riddle!

Ha ha. Marcus, u're so close, n on the right track too! They're not interpreting 100 to be 60s; this is how a microwave works, according to that website I've been to. If u key in 30, it'd be 30s. 90, 90s. 60, 60s. But 100's equivalent to 60s. Ha ha. Excellent!

More lame stuff'll be written here n in the class diary, since it's now in my hands! Thanks to whoever that wrapped it up so nicely!