# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 398 - 406 of 1012

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## Question number: 398

MCQ▾

### Question

The value of x in is ________.

### Choices

Choice (4) Response

a.

b.

c.

1

d.

3

## Question number: 399

MCQ▾

### Question

The algebraic expression obtained on addition of following algebraic expression is ________.

### Choices

Choice (4) Response

a.

b.

c.

2y

d.

0

## Question number: 400

MCQ▾

### Question

The value of 25 coins of 20 p and 50 p is Rs. 9.80. The number of 50 p coins is ________.

### Choices

Choice (4) Response

a.

16

b.

30

c.

20

d.

32

## Question number: 401

MCQ▾

### Question

The value of is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 402

MCQ▾

### Question

Express 0.0084 in scientific notation.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 403

MCQ▾

### Question

The number which is multiplied by to obtain a product equal to is ________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 404

MCQ▾

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 405

MCQ▾

### Question

What is the value of at ?

### Choices

Choice (4) Response

a.

ab

b.

0

c.

d.

ac

## Question number: 406

MCQ▾

### Question

When a number is reduced by 12, it becomes 20 % of itself. Find the number.

### Choices

Choice (4) Response

a.

15

b.

30

c.

12

d.

25