Mental Maths Class 5 Playing with Numbers

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

684 employees work in an office building, and the same number of employees work on each floor. Which of the following cannot be the number of floors of the building?

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A 12
B 9
C 19
D 17

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Answer: D. 17

The number 684 should be completely divisible by the number of floors. 684/17 fractional answer whereas 684 when divided by 12, 9 , or 19 gives an integer answer. 17 cannot be the number of floors in the building.

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684 employees work in an office building, and the same number of employees work on each floor. Which of the following cannot be the number of floors of the building?

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