# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 545 - 549 of 1022

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## Question 545

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### Question

MCQ▾

Rohan has certain amount in his account. He gives two-third of this to his mother and one third of the remaining to his daughter. The amount left with him now is ________.

### Choices

Choice (4)Response
a. of the original
b. of the original
c. of the original
d. of the original

## Question 546

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### Question

MCQ▾

A school has 4500 students. The ratio of girls to boys 5: 4. How many girls are there in the class?

### Choices

Choice (4)Response
a.2000
b.2100
c.2400
d.2500

## Question 547

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### Question

MCQ▾

Equal sums of Rs. 5500 were lent to Neha and Suman at 10 % per annum for a period of 2 years and 3 years respectively. Find the difference of the interest paid by Neha and Suman.

### Choices

Choice (4)Response
a.Rs. 150
b.Rs. 350
c.Rs. 280
d.Rs. 550

## Question 548

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### Question

MCQ▾

There are three drums with 1653 liters, 2261 liters and 2527 liters of petrol. The greatest possible size of the measuring vessel with which we can measure the petrol of any drum while every time the vessel must be completely filled is ________.

### Choices

Choice (4)Response
a.19
b.27
c.41
d.31

## Question 549

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### Question

MCQ▾

An organization sent out 420 invitations for a fund-raiser function. Of the people invited, 315 attended. What percent of the people invited attended the fund-raiser?

### Choices

Choice (4)Response
a.25%
b.75%
c.43%
d.33%