91.

In the product of (9x + 15 - x) and ( - 1 - x + x²), if A, B and C are the coefficients of x³, x² and x respectively, then the value of (A + B - C) is

•  - 3

• 14

• - 17

• 11

A person marks his goods 40% above the cost price and allows 40% discount on the marked price. His loss/gain percent is

• loss, 8%

• No loss/gain

• gain, 10%

• loss, 16%

'Problem posing' in Mathematics means

• raising doubts in the class

• inability to solve problems

• solving problems

• creating problems from the content

Which of the following is not an important aspect in 'algebra' ?

• Measurement

• Visualisation

• Transposition

• Generalisation

$$\begin{gathered} \mathrm{What} \mathrm{is} \mathrm{the} \mathrm{value} \mathrm{of} \mathrm{A} \mathrm{such} \mathrm{that} \\ \sqrt[3]{500} \times \sqrt[3]{ - 3456} = 40 \times \mathrm{A} \mathrm{is} \mathrm{true} ? \end{gathered}$$

•  - 3

•  - 12

• - 15

• - 2

Ravi purchased two articles for t 1500 each. He sold them, gaining 6% on one and losing 4% on the other. His gain/loss per cent in the whole transaction is

• gain, 1%

• Loss, $1\frac{1}{2}\%$

• gain, 2%

• loss, 1%

$\mathrm{What} \mathrm{is} \mathrm{the} \mathrm{value} \mathrm{of} \frac{1}{2}\% \mathrm{in} \mathrm{decimals} ?$

• 0.0005

• 0.005

• 0.05

• 0.5

2x + 4y - 8xy - 1 is equal to

• $\left(1 + 4\mathrm{y}\right)\left(2\mathrm{x} - 1\right)$

• $\left(1 - 4\mathrm{y}\right)\left(2\mathrm{x} - 1\right)$

• $\left(1 - 4\mathrm{y}\right)\left(2\mathrm{x} + 1\right)$

• None of the above

If 3x + 7y = 75, 5x - 5y = 25, then the value of (x + y) is equal to

• 17

• 16

• 18

• 15

Neena and Meena started a business with investment of Rs. 30000 and Rs. 45000, respectively. What will be the share of Meena from the profit on Rs 150000 after 2 yr ?

• Rs. 30000

• Rs. 45000

• Rs. 75000

• None of these