# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 181 - 191 of 1042

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## Question 181

### Question

MCQ▾

A number is multiplied by itself and then 10 is subtracted from the product. If the final result is 590, then find the original number.

### Choices

Choice (4)Response

a.

60

b.

36

c.

30

d.

50

## Question 182

### Question

MCQ▾

Three numbers are in the ratio of 4: 3: 2. The sum of their cubes is 21384. The numbers are________.

### Choices

Choice (4)Response

a.

b.

6: 12: 18

c.

15: 30: 45

d.

## Question 183

MCQ▾

If , then

### Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

## Question 184

### Question

MCQ▾

The value of is ________.

### Choices

Choice (4)Response

a.

4.00

b.

2.5

c.

7.5

d.

8.5

## Question 185

### Question

MCQ▾

If , then is equal to________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 186

### Question

MCQ▾

If , then the value of is________.

### Choices

Choice (4)Response

a.

11.1

b.

24.7

c.

22.7

d.

30.2

## Question 187

### Question

MCQ▾

The cube of a number is four times of then find where

### Choices

Choice (4)Response

a.

1

b.

0

c.

2

d.

4

## Question 188

MCQ▾

=

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 189

Edit

### Statement

True-False▾

The sum of the cubes of first n natural numbers is equal to the square of their sum. This statement is true or not?

## Question 190

### Question

MCQ▾

The cube root of is________.

### Choices

Choice (4)Response

a.

64

b.

4

c.

16

d.

8

## Question 191

### Question

MCQ▾

In the five digit number 13ab-4, a is the greatest single digit perfect cube and a is greater four times of b. then find the sum of the number and its cube root is________.

### Choices

Choice (4)Response

a.

13848

b.

13820

c.

13825

d.

13824