IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 405 - 413 of 1022

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Question 405

Question

MCQ▾

What is the value of at ?

Choices

Choice (4)Response

a.

0

b.

ac

c.

ab

d.

Question 406

Question

MCQ▾

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

Question 407

Question

MCQ▾

The value of is ________.

Choices

Choice (4)Response

a.

b.

c.

d.

Question 408

Question

MCQ▾

Two numbers are 15 % and 30 % less than a third number respectively. How much % is the second number less than the first?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 409

Question

MCQ▾

A number P exceeds Q by 50 % . By what percentage is P more than Q?

Choices

Choice (4)Response

a.

30 %

b.

50 %

c.

55 %

d.

35 %

Question 410

Question

MCQ▾

Two numbers are in the ratio of 5: 4. If 5 be added to both, their ratio changes to 6: 5. The smaller number is ________.

Choices

Choice (4)Response

a.

25

b.

32

c.

36

d.

20

Question 411

Question

MCQ▾

Choices

Choice (4)Response

a.

b.

c.

d.

Question 412

Question

MCQ▾

A contractor employed 210 men to build a house in 60 days. After 12 days, he was joined by 70 more men. In how many days will the remaining work be finished?

Choices

Choice (4)Response

a.

40 days

b.

36 days

c.

38 days

d.

35 days

Question 413

Question

MCQ▾

Step 1:

Step 2:

Step 3:

Are the above given steps showing simplification of algebraic expression

?

Choices

Choice (4)Response

a.

Yes

b.

Only step 1 is correct

c.

Only step 1 and 2 are correct

d.

No