** Remember to create the table with the check column.
2) I have 23 conis. Some are 10 cents and the others are 20 cents. I have more 10 cents conins than 20 cents coins. The total value of the coins is $3.40. How many 10 cents coins do I have?
3) Faiez bought a total of 12 pens and pencils. The pens cost $2 each and the pencils cost $1 each. If he spent a total of $20, how many pens did he buy?
4) There are a total of 16 bicycles and tricycles in a park. There are 36 wheels altogether. How many bicycles are there?