# Mental Ability (NCO- Cyber Olympiad Class 7): Questions 154 - 158 of 205

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## Question number: 154

» Mental Ability » Basic Algebra

MCQ▾

### Question

Step 1:

Step 2:

Step 3:

Are the above given steps a simplification of algebraic expression

### Choices

Choice (4) Response

a.

Only step 1 is correct

b.

Only step 1 and 2 are correct

c.

No

d.

Yes

## Question number: 155

» Mental Ability » Basic Statistics

Match List-Ⅰ List-Ⅱ▾

### Question

Match the reciprocal of each of the following in exponential form:
 List-Ⅰ List-Ⅱ (A) Equation (i) Equation (B) Equation (ii) Equation (C) Equation (iii) 1 (D) Equation (iv) Equation

### Choices

Choice (4) Response
• (A)
• (B)
• (C)
• (D)

a.

• (iv)
• (iii)
• (ii)
• (i)

b.

• (ii)
• (iii)
• (iv)
• (i)

c.

• (i)
• (iii)
• (iv)
• (ii)

d.

• (ii)
• (iv)
• (i)
• (iii)

## Question number: 156

» Mental Ability » Basic Geometry

MCQ▾

### Question

STU is an isosceles triangle with ST = SU and and SV is an altitude of a triangle STU, then

### Choices

Choice (4) Response

a.

b.

25°

c.

55°

d.

## Question number: 157

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

The average age of 15 children in a class is 7 years. If the teacher’s age is included, the average age becomes 10 years. Find the teacher’s age.

### Choices

Choice (4) Response

a.

55

b.

42

c.

35

d.

45

## Question number: 158

» Mental Ability » Basic Arithmetic

MCQ▾

### Question

. If = 0.008, then will be ________

### Choices

Choice (4) Response

a.

0.125

b.

1

c.

0.0625

d.

0.20

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