Question
PSLE
Simon had cookies and Carl had tarts. Both gave half of what they had to each other. Simon sold 13 cookies and Carl sold 37 tarts. In the end, the ratios of cookies to tarts for Simon and Carl were 1 : 5 and 1 : 3 respectively. How many cookies did Simon have at first?
4 m

Click button first when a symbol is required. X

PSLE
Simon had cookies and Carl had tarts. Both gave half of what they had to each other. Simon sold 13 cookies and Carl sold 37 tarts. In the end, the ratios of cookies to tarts for Simon and Carl were 1 : 5 and 1 : 3 respectively. How many cookies did Simon have at first?