# NCO- Cyber Olympiad Class 7: Questions 140 - 143 of 416

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## Question number: 140

MCQ▾

### Question

The product of two numbers is 25 and the sum of their squares is 125. The sum of the number is.

### Choices

Choice (4) Response

a.

21.21

b.

13.22

c.

16.90

d.

None of the above

## Question number: 141

MCQ▾

### Question

If and be any two rational numbers then we define:

Thus, subtracting a rational number means adding its additive inverse. Based on the statement given above solve the following Problem: Subtract from.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 142

MCQ▾

### Question

Two positions of a dice are shown below. When there are 3 circles at the button, the number of circles at the button will be

### Choices

Choice (4) Response

a.

4

b.

5

c.

6

d.

1

## Question number: 143

Match List-Ⅰ List-Ⅱ▾

### Question

Match the following.
 List-Ⅰ List-Ⅱ (A) Orthocenter (i) The point at which the three angle bisectors of a triangle meet (B) Circumcenter (ii) The point of intersection of the perpendicular of the sides of a triangle (C) In Centre (iii) The point at which the medians of a triangle meet (D) Centroid (iv) The point at which the altitudes of a triangle meet

### Choices

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

a.

• (iii)
• (i)
• (iv)
• (ii)

b.

• (i)
• (iii)
• (iv)
• (ii)

c.

• (iv)
• (ii)
• (i)
• (iii)

d.

• (iv)
• (iii)
• (ii)
• (i)

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