Question

choose the correct option.

1. The multiplicative Identity for rational numbers is
(a)-1 (b) 1 (c)0 (d)None of these
2. The value of x in the equation 3x-1 = 14 - 2x is
(a) – 3 (6)
(c) 5 (d)
3. The fourth angle of a quadrilateral in which the three angles are 110°,50° and 40° is
(a)200° (b) 160° (c) 140° (d) 100°
4.3"-33= 3', m is equal to
(a) 1
(6) 2
(c) 3 (d) 4
5. The smallest 3-digit perfect square is
(a) 999 (b) 100 (c) 961 (d) 125
6. What is the one's digit in the cube root of the cube number 8000?
(a) 0 (6) 2
(c)4
(d) 8
7. In a class of 50 students, 40 are boys and the rest are girls. The ratio of the number of bo
(a) 2:3 (6) 1:5 (c) 4:1 (d)2:5
8. The value of x-2yx+y?when x=1, y=2 is
(a) (b)-1 (c)2 (d)-2
9. The sum of x²-y?, y? -zand z-x?is
(a) 0 (6) 3x² (c) 3y²
10. Identify the Euler's formula?
(a) F+V = E+2 (6) F+E = V+2 (c) V+E=F+2 (d)F+V = E-2
11. If the height of a cuboid becomes zero, it will take the shape of a
(a) Cube (6) Parallelogram (c) Circle (d) Rectangle.


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Answer 1

Answer:

1. 3x-1 = 14-2x

= 3x +2x = 14+1

5x = 15

x = 15/5 = 3

x =3

• sum of angles of quadrilateral = 360
• 110+50+40+x = 360
• 200+x = 360
• x = 360-200
• x = 160

• 100 is the smallest 3 digit sq.

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Answer 2

1. (a) -1 is correct
2. 3 is right answer
3. 160° is right answer
4. . can't able understand ur questions post it again
5. 100 is right answer
6. .
7. 4:1
8. -1
9. .
10. F+V=E+2
11. rectangle

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