Question
PSLE
At first, a box contained 10 grey beads and some blue beads. After some grey beads were added, 25 of the beads were blue. After 78 black beads were added to the box and now, 211 of the beads were blue. What was the number of grey beads added?
2 m

Click button first when a symbol is required. X

PSLE
At first, a box contained 10 grey beads and some blue beads. After some grey beads were added, 25 of the beads were blue. After 78 black beads were added to the box and now, 211 of the beads were blue. What was the number of grey beads added?