Arithmeticmedium · Past Paper
Two numbers are in the ratio 3:5. If each number is increased by 10, the ratio becomes 5:7. The numbers are:
A15, 25
B3, 5
C30, 50
D12, 20
✓ Correct Answer: A — 15, 25
(3x+10)/(5x+10) = 5/7 => 21x+70 = 25x+50 => 4x=20 => x=5. Numbers are 15 and 25.
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