Question
PSLE
At first, a box contained 3 blue beads and some brown beads. After some blue beads were added, 57 of the beads were brown. After 30 red beads were added to the box and now, 513 of the beads were brown. What was the number of blue beads added?
2 m

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PSLE
At first, a box contained 3 blue beads and some brown beads. After some blue beads were added, 57 of the beads were brown. After 30 red beads were added to the box and now, 513 of the beads were brown. What was the number of blue beads added?