# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 621 - 625 of 931

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## Question 621

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### Question

MCQ▾

The age of Sandhya’s father is 5 times of his age. If 6 years ago, father’s age was 8 times of the age of his son at that time. What is Sandhya’s father present age?

### Choices

Choice (4)Response
a.56 years
b.70 years
c.75 years
d.41 years

## Question 622

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### Question

MCQ▾

Give the equations of two lines passing through. How many more such lines are there?

### Choices

Choice (4)Response
a.Infinitely many
b.Exactly Two
c.Only one
d.Exactly three

## Question 623

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### Question

MCQ▾

The following observations have been arranged in the ascending order. If the median of the data 13,26,32,37, x + 2, x + 4,62,68,74,85 is 43, then the value of x is ________

### Choices

Choice (4)Response
a.40
b.42
c.44
d.46

## Question 624

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### Question

MCQ▾

The probability of guessing the correct answer to a certain test question is . If the probability of not guessing the correct answer to this question is , then x = ________

### Choices

Choice (4)Response
a.2
b.
c.3
d.

## Question 625

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### Question

MCQ▾

Ten people are planning to share equally the cost of a rental bike. If one person withdraws from the arrangement and the others share equally the entire rental of the bike, then the share of each of the remaining persons is increased by ________ of the original share.

### Choices

Choice (4)Response
a.
b.7
c.
d.