Cost price of 20 articles is equal to selling price of x articles. If the profit is 25%, then the value of x is

• 15

• 16

• 18

• 25

The value of a machine depreciates at the rate of 10% per year. It was purchased 3 yr ago. If its present value is $₹$145800 for how much was it purchased?

• $₹$175800

• $₹$180000

• $₹$200000

• $₹$210000

63.

$\mathrm{If} {\mathrm{x}}^2 + \frac{1}{{\mathrm{x}}^2} = 34, \mathrm{then} \mathrm{find} \mathrm{the} \mathrm{value} \mathrm{of} \mathrm{x} + \frac{1}{\mathrm{x}}$

• 4

• 6

• 8

• 17

What value should come in place of question mark ?

(1.06 + 0.04)² - ? = 4 x 1.06 x 0.04

• 1.0404

• 1.4

• 1.5

• 1.45

Sum of first 20 terms of the Arithmetic Progression (AP) 11, 7, 3, ... is

• 20

• - 540

• 980

• - 65

$\mathrm{If} \mathrm{x} : \mathrm{y} = 3 : 4, \mathrm{then} \mathrm{find} \mathrm{the} \mathrm{value} \mathrm{of} \frac{2\mathrm{x} + 3\mathrm{y}}{3\mathrm{x} + 4\mathrm{y}}$

• $\frac{9}{25}$

• $\frac{18}{25}$

• $\frac{7}{18}$

• $\frac{17}{25}$

0.46 x 0.46 + 0.54 x 0.54 + 0.92 x 0.54 = ?

• 1

• 10

• 11

• 0.12

If the price of an item A is 25% less than that of the item B. How much per cent is the price of B more than that of A ?

• 50

• $33\frac{1}{3}$

• $16\frac{2}{3}$

• 25

Bhaskara's book 'Leelavati' was translated
into English by

• James taylor

• Mark taylor

• A.I. Babham

• None of these

$$\begin{gathered} \mathrm{If} {\mathrm{a}}^3 = 1 + 7, 3^3 = 1 + 7 + \mathrm{b} \mathrm{and} 4^3 = 1 + 7 + \mathrm{c}, \mathrm{where} \mathrm{a}, \mathrm{b} \mathrm{and} \mathrm{c} \mathrm{are} \mathrm{different} \mathrm{positive} \\ \mathrm{integers}, \mathrm{then} \mathrm{the} \mathrm{value} \mathrm{of} \mathrm{a} + \mathrm{b} + \mathrm{c} \mathrm{is} \end{gathered}$$

• 77

• 79

• 58

• 68