Mental Ability (NCO- Cyber Olympiad Class 9): Questions 205 - 209 of 219

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Question number: 205

» Mental Ability » Basic Algebra

MCQ▾

Question

Which expression describes the area in square units of a rectangle that has a width of 4x3y2 and a length of 3x2y3 ?

Choices

Choice (4) Response

a.

7x6y6

b.

12x5y5

c.

7x5y5

d.

12x6y6

Question number: 206

» Mental Ability » Basic Algebra

MCQ▾

Question

A 108-cm piece of wire was cut into equal segments, which were then soldered at the ends to form the edges of a cube. What is the volume of the cube?

Choices

Choice (4) Response

a.

648 cm3

b.

729cm3

c.

326cm3

d.

1785cm3

Question number: 207

» Mental Ability » Basic Algebra

MCQ▾

Question

Rahul has a broken fan belt on his car. The belt goes around 2 pulleys, whose centers are 15 cm apart and each pulley is 4 cm in diameter. How long should the belt be?

Choices

Choice (4) Response

a.

45.6 cm

b.

42.6 cm

c.

40 cm

d.

45 cm

Question number: 208

» Mental Ability » Basic Algebra

MCQ▾

Question

A Stadium contained an equal number of boys and girls. 15 girls left to play tennis, leaving twice as many boys as girls in the Stadium. Then the number of students in the Stadium originally was________

Choices

Choice (4) Response

a.

40

b.

70

c.

60

d.

15

Question number: 209

» Mental Ability » Basic Algebra

MCQ▾

Question

Which of the equations below represents the second step of the solution process?

Step 1. 7(2x250)50=1000

Step 2. ________

Step 3. 14x2400=1000

Step 4. 14x2=1400

Step 5. x2=100

Step 6. x=10

Choices

Choice (4) Response

a.

5(18x+12)=1000

b.

5(14x+1)+50=1400

c.

14x235050=1000

d.

14x35050=1400

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