Squares & Square roots

The one's digit in the square of which of these numbers is the highest?

• 123565

• 178922

• 356799

• 1277

Vihaan bought a book of 900 pages. He finished reading 50% of the book. How many pages having perfect square page numbers did he finish reading?

• 18

• 19

• 20

• 21

How many natural numbers lie between the squares of 250 and 251?

• 499

• 500

• 501

• 502

Find a Pythagorean triplet, whose smallest number is 10.

• 10, 25, 26

• 10, 24, 25

• 10, 24, 26

• 10, 23, 26

In a Tulip farm, there are 5476 plants in total. They were planted in such a way that the number of Tulip plants in a row is equal to the total number of rows.

Can you calculate the total number of rows in the farm?

• 66

• 74

• 76

• 84

A library has books belonging to 6 different categories. Each category has 12 rows containing 12 books in each row. What is the total number of books in the library?

• 144

• 720

• 864

• 884

Find the smallest number by which 156 should be multiplied in order to get a perfect square.

• 39

• 13

• 5

• 3

Find the smallest square number that is completely divisible by each of 6, 14 and 18.

• 1444

• 1764

• 2304

• 2500

784 wind mills must be installed in a city in such a way that they form a square grid. What should be the number of wind mills per row?

• 22

• 26

• 28

• 32

• 12.02

• 12.08

• 12.2

• 12.8