When 73² is subtracted from the square of a number, the answer that is obtained is 5280. What is the number?

• 97

• 103

• 99

• 101

2.

ind te value of $\sqrt{\frac{1.44 \times 0.81}{0.9 \times 3.6}}$ = ?

• 0.6

• 0.5

• 1

• 0.75

A number when tripled and decreased by 15 we get the result as 120. Find the number

• 45

• 40

• 42

• 50

The value of 0.001 + 1.01 + 0.11 is

• 1.013

• 1.121

• 1.111

• 1.101

In 1999, the population of a country was 30.3 million. The number which is the same as 30.3 million is

• 3030000

• 3030000000

• 303000000

• 30300000

One factor of x⁴ + x² + 1 is

• x² - x + 1

• x² - x - 1

• x² + 1

• x² + x - 1

The number n is doubled and then y is added to it. The result is, then divided by 2 and the original number n is subtracted from it. The final result is

• n + y

• $\frac{\mathrm{n} + \mathrm{y} }{2}$

• y

• $\frac{\mathrm{y}}{2}$

The difference between the simple interest and compound interest on a certain, sum of money at 4% per annum for two years is Rs. 10. The sum will be

• 4500

• 5500

• 5750

• 6250

"The sum of two whole numbers is also a whole number." This property of whole numbers is known as

• associative property of addition

• commutative property of addition

• closure property of addition

• property of componendo-dividendo

What should be subtracted from $\frac{ - 5}{7}$ to get  $\frac{ - 2}{3}$ ?

• $\frac{29}{21}$

• $\frac{- 1}{21}$

• $\frac{ - 29}{21}$

• $\frac{1}{21}$