IMO- Mathematics Olympiad Class 7: Questions 309 - 315 of 965

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Question number: 309

» Algebraic Expressions

MCQ▾

Question

The value of 5x215y2+30xy when x=18 and y=6 is ________.

Choices

Choice (4) Response
a.

1108

b.

1208

c.

1080

d.

1380

Question number: 310

» Exponents and Powers

MCQ▾

Question

If 3x=500 , then the value of 3x2 is ________.

Choices

Choice (4) Response
a.

5003

b.

10009

c.

5009

d.

1009

Question number: 311

» Algebraic Expressions

MCQ▾

Question

If 7x32x=9 , then the value of 49x2+94x2 .

Choices

Choice (4) Response
a.

112

b.

60

c.

105

d.

102

Question number: 312

» Comparing Quantities

MCQ▾

Question

Salary of an officer increases every year by 20%. His salary in the year 2001 was Rs. 26640. What was his salary in 1999?

Choices

Choice (4) Response
a.

Rs. 19, 528

b.

Rs. 18, 500

c.

Rs. 20, 000

d.

Rs. 19, 028

Question number: 313

» Algebraic Expressions

MCQ▾

Question

The value of (5x2y)×(23xy2z)×(815xyz2)×(14z) is ________.

Choices

Choice (4) Response
a.

49x4y4z4

b.

49x3y3z3

c.

49x4y4z4

d.

49x3y3z3

Question number: 314

» Comparing Quantities

MCQ▾

Question

In an election between two candidates, the candidate who gets 45 % of the votes polled is defeated by 7, 500 votes. What is the number of votes polled by the winning candidates?

Choices

Choice (4) Response
a.

35, 000

b.

41, 250

c.

75, 000

d.

31, 250

Question number: 315

» Comparing Quantities

MCQ▾

Question

P can do a piece of work in 9 days. Q is 50 % more efficient than P. The number of days it takes Q to do the same piece of work is ________.

Choices

Choice (4) Response
a.

6

b.

412

c.

1312

d.

3

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