Question
PSLE
Yoko had two strings of the same length. She cut the first string into equal parts of length 40 cm and to each part she tied 2 blue flags. After that, she cut the second string into equal parts of length 50 cm and to each part she tied 3 black flags. When she finished tying, she counted that there were 4 more black flags than blue flags. How many flags were there altogether?
5 m

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PSLE
Yoko had two strings of the same length. She cut the first string into equal parts of length 40 cm and to each part she tied 2 blue flags. After that, she cut the second string into equal parts of length 50 cm and to each part she tied 3 black flags. When she finished tying, she counted that there were 4 more black flags than blue flags. How many flags were there altogether?