Arithmeticeasy · Past Paper
If the ratio of two numbers is 4:5 and their sum is 81, find the smaller number.
A36
B45
C40
D32
✓ Correct Answer: A — 36
Let the numbers be 4x and 5x. 4x + 5x = 81 implies 9x = 81, so x = 9. Smaller number = 4 * 9 = 36.
Share this question