Among six persons F, G, H, I, J, and K, who is second tallest?

I. F is shorter than only two persons and I is taller than only J.

II. H is taller than only two persons, I is taller than H but shorter than G. K is the tallest.

From I, Statement I alone is not sufficient to answer the question. From II, K G I H F/J F/J G is the second tallest. Hence Statement II alone is sufficient to answer the question.

The average of 9 numbers is 100. The average of the first 4 numbers is 65 and the average of the last 4 numbers is 40. What is the 5

^{th}number?The average age of 18 children and their teacher's age are 15 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?

The average age of 15 children and their teacher's age are 12 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?

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