Mental Maths Class 5 Fractions and Decimals

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

A cake is divided into 12 equal slices. Rohan eats 1/4 of the cake. His sister eats 1/3 of the remaining cake. What fraction of the original cake is left?

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A 1/2
B 1/4
C 5/12
D 1/6

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Answer: A. 1/2

Explanation: Rohan eats 3 slices (1/4 of 12). 9 slices are left. His sister eats 1/3 of those 9 slices, which is 3 slices. That leaves 6 slices total. 6 out of 12 is exactly 1/2 of the cake.

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A cake is divided into 12 equal slices. Rohan eats 1/4 of the cake. His sister eats 1/3 of the remaining cake. What fraction of the original cake is left?

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