IMO- Mathematics Olympiad Class 9: Questions 665 - 671 of 919

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Question number: 665

» Everyday Mathematics

MCQ▾

Question

If 100 men can do a job in 80 days, in how many days will 120 men do it in ________.

Choices

Choice (4) Response
a.

69 days

b.

67 days

c.

65 days

d.

63 days

Question number: 666

» Introduction to Euclid's Geometry

MCQ▾

Question

In the figure 3x = 90˚, then ∠ROS is________

Find the value of angle ROS

Find the Value of Angle ROS

Different angles are given and find the ∠ros.

Choices

Choice (4) Response
a.

140˚

b.

130˚

c.

150˚

d.

120˚

Question number: 667

» Everyday Mathematics

MCQ▾

Question

The compound interest on Rs. 80000 at 20% per annum for 9 months, compound quarterly is ________

Choices

Choice (4) Response
a.

Rs. 15610

b.

Rs. 12610

c.

Rs. 14610

d.

Rs. 13610

Question number: 668

» Polynomials

MCQ▾

Question

If de+ef+fd=0 , then 1d2ef+1e2fd+1f2de =

Choices

Choice (4) Response
a.

1

b.

0

c.

3

d.

2

Question number: 669

» Everyday Mathematics

MCQ▾

Question

A man rows downstream 30 km and upstream 18 km, taking 5 hours each time. The velocity of current is ________

Choices

Choice (4) Response
a.

6 km/hr

b.

1.2 km/hr

c.

3.6 km/hr

d.

2.4 km/hr

Question number: 670

» Introduction to Euclid's Geometry

MCQ▾

Question

According to Euclid, a point has________

Choices

Choice (4) Response
a.

No length, no breadth and no thickness

b.

No Length but breadth and thickness

c.

Length, breadth and thickness

d.

Length and breadth but no thickness

Question number: 671

» Linear Equations in Two Variables

MCQ▾

Question

The number of values of k for which the system of equations x+y=5 , kx+y=9, x+ky=15 has the solutions?

Choices

Choice (4) Response
a.

k=165ork=1

b.

k=195ork=1

c.

k=105ork=1

d.

k=115ork=1

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