# IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 86 - 92 of 968

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## Question 86

### Question

MCQ▾

If are the roots of then is ________

### Choices

Choice (4)Response

a.

-15

b.

-20

c.

-10

d.

-5

## Question 87

### Question

MCQ▾

The ratio between a two – digit number and the sum of digits of that number is . If the digit in the unit place is 3 more than the digit in the tenth place, what is the number?

### Choices

Choice (4)Response

a.

40

b.

63

c.

24

d.

36

## Question 88

### Question

MCQ▾

The value of k for which the system of equations has no solution, is ________

### Choices

Choice (4)Response

a.

1

b.

10

c.

6

d.

3

## Question 89

### Question

MCQ▾

If one zero of the polynomial is a reciprocal of the other, then k is equal to ________

### Choices

Choice (4)Response

a.

5

b.

7

c.

9

d.

2

## Question 90

### Question

MCQ▾

The denominators of a rational number is greater than its numerator by 5. If 2 is subtracted from the numerator and 5 is added to the denominator, the new number becomes . Then the original number was ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 91

### Question

MCQ▾

If are the roots of the equation , then the equation whose roots are and is ________

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 92

### Question

MCQ▾

The difference of roots of the quadratic equation is ________

### Choices

Choice (4)Response

a.

b.

c.

d.