21.

Most appropriate formative task to assess the student's understanding of data analysis is

• Role play

• Cross word

• Survey-based project

• Quiz

A die is thrown once. The probability of getting a prime number is

• $\frac{2}{3}$

• $\frac{1}{3}$

• $\frac{1}{2}$

• $\frac{3}{2}$

If a set A contains 5 elements then, the number of subsets of A where none of the subset is empty set, is

• 32

• 16

• 64

• 31

If(x - 2) is a factor of x³ + ax² + bx + 16 and b = 4a, then respective values of a and b are respectively

• 2, - 8

• - 2, 8

• - 2, - 8

• 2, 8

In the given figure if l $\parallel$ m, then the value of x is

• 60⁰

• 40⁰

• 80⁰

• 140⁰

The polynomial

$\mathrm{P}\left(\mathrm{x}\right) = {\mathrm{x}}^4 - 2{\mathrm{x}}^3 + 3{\mathrm{x}}^2 - \mathrm{ax} + 3\mathrm{a} - 7$

when divided by (x + 1) leaves the remainder 19. The value of a is

• 3

• 2

• 5

• 4

The abscissa of the point( - 2, - 5) is

• 2

• - 2

• 5

• - 5

LCM and HCF of two numbers p and q are P and Q, respectively.

If P - p = q - Q, then

• ${\mathrm{p}}^2 + {\mathrm{q}}^2 = {\mathrm{P}}^2 + {\mathrm{Q}}^2$

• ${\mathrm{p}}^2 - {\mathrm{P}}^2 = {\mathrm{q}}^2 - {\mathrm{Q}}^2$

• P - Q = p - q

• pP = qQ

A person have some one rupee, 50 paise and 25 paise coins totalling Rs 210 in the ratio 5 : 6 : 8, then number of one rupee coin is

• 41

• 42

• 103

• 105

$\mathrm{If} 3 \le \mathrm{x} \le 10 \mathrm{and} 5 \le \mathrm{y} \le 15, \mathrm{then} \mathrm{minimum} \mathrm{value} \mathrm{of} \left(\frac{\mathrm{x}}{\mathrm{y}}\right) \mathrm{is}$

• $\frac{1}{3}$

• $\frac{1}{2}$

• $\frac{1}{5}$

• 10