Have a research on different types of recreational math problem such as Sodoku, ken-ken puzzle ,riddle, and alike. Submit at least any five examples with corresponding solutions.

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.