Question
PSLE
At first, a box contained 11 red beads and some purple beads. After some red beads were added, 37 of the beads were purple. After 45 grey beads were added to the box and now, 310 of the beads were purple. What was the number of red beads added?
2 m

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PSLE
At first, a box contained 11 red beads and some purple beads. After some red beads were added, 37 of the beads were purple. After 45 grey beads were added to the box and now, 310 of the beads were purple. What was the number of red beads added?