IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 649 - 656 of 931

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Question 649

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Question

MCQ▾

If then =

Choices

Choice (4)Response
a.2
b.1
c.3
d.4

Question 650

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Question

MCQ▾

If, and, then

Choices

Choice (4)Response
a.85
b.120
c.60
d.144

Question 651

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Question

MCQ▾

The number of ways of writing the number in the form (a, b are integers)

Choices

Choice (4)Response
a.1
b.Infinitely many
c.0
d.Finitely many

Question 652

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Question

MCQ▾

A class starts at 10 a. m. and lasts till 1.27 p. m. four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is ________

Choices

Choice (4)Response
a.48 minutes
b.51 minutes
c.42 minutes
d.53 minutes

Question 653

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Question

MCQ▾

The product of all the solutions of , is ________.

Choices

Choice (4)Response
a.4
b.
c.16
d.

Question 654

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Question

MCQ▾

The number of positive integers k for which the equation has an integer solution for x is ________

Choices

Choice (4)Response
a.2
b.3
c.5
d.8

Question 655

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Question

MCQ▾

The median of the observation 30,91,0, 64,42,80,30,5, 117,71 is ________

Choices

Choice (4)Response
a.52.5
b.51
c.53
d.52

Question 656

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Question

MCQ▾

In the figure y = 30˚, then ∠DOE is________ (Assume X = Y)

Find the value of angle DOE

Find the Value of Angle DOE

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Choices

Choice (4)Response
a.150˚
b.30˚
c.60˚
d.90˚