Which of the following numbers is a perfect square?

Find the range of the data : 11,13, 9, 17, 13, 19, 10, 11

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A prime number

The sum of three consecutive even numbers is 42. Find the middle number.

How many times does the number 5 occur in the range of numbers from 1 to 100?

The sum of two digits of a number is 10. If the digits are interchanged, then its value increases by 18. Find the number.

Find the mean of the first 6 prime numbers?

What smallest number should be added to the sum of squares of 15 and 14, so that the resulting number is a perfect square?

In the given series, how many 8s are there that are not divisible by the number to its left but completely divisible by the number to its right.

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