Question
PSLE
At first, a container contained 4 blue marbles and some grey beads. After some blue marbles were added, 25 of the marbles were grey. After 68 pink marbles were added to the container and now, 29 of the beads were grey. What was the number of blue marbles added?
2 m

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PSLE
At first, a container contained 4 blue marbles and some grey beads. After some blue marbles were added, 25 of the marbles were grey. After 68 pink marbles were added to the container and now, 29 of the beads were grey. What was the number of blue marbles added?