Four gardeners each watered a fraction of their flower bed before lunch. Ahmad watered 56 of his bed, Beng watered 78 of his, Chitra watered 910 of hers and Devi watered 1112 of his. Which gardener watered the smallest fraction of their bed?
- Ahmad
- Beng
- Chitra
- Devi
Need a hint?
Write all four fractions over the same denominator, then compare the numerators.
Worked answer
- Find a common denominator for 6, 8, 10 and 12: 120.
- Change each fraction: 56 = 100120, 78 = 105120, 910 = 108120, 1112 = 110120.
- Compare the numerators: 100 is the smallest, so 56 is the smallest fraction.
- Ahmad watered the smallest fraction of his bed.
Answer: Ahmad
The mistake this question tests
Habit
Factors and multiples (HCF, LCM)
Comparing only the numerators or only the denominators gives the wrong order. A fraction with a bigger denominator is not automatically bigger.
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See the answer →Practise PSLE fractions until the mistakes stop.
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