The average age of a group of children increases by 1 year if a 9 year old joins the group

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Previous Question: The perimeter of an isoscles trapezium is 16 cm and the shorter parallel side is one-third of the longer parallel side. If the sum of the lengths of the opposite sides of the trapezium are equal, what is the area (in sq. cm.) of the trapezium.

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The average age of a group of children increases by 1 year if a 9 year old joins the group and decreases by 2 years if a 11 year old leaves the group. Find the number of children in the group.

1) 8
2) 6
3) 5
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As a toddler when I looked at my fingers and wondered, you helped me to count numbers. As a kid when I looked at stars with awe, you helped me and told that's infinity. As a teen when my confused mind often went blank, you told that's zero and eventually

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The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?

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Latest MBA Aptitude Question SOLUTION: The average age of a group of children increases by 1 year if a 9 year old joins the group and decreases by 2 years if a 11 year old leaves the group. Find the number of children i

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(#M40016256) MBA Numerical Ability question time speed and distance, work, alligations & mixtures Keep an EYE