IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 822 - 827 of 931

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Question 822

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Question

MCQ▾

Tea worth Rs. 126 per kg and Rs. 135 per kg are mixed with a third variety in the ratio. If the mixture is worth Rs. 153 per kg, the price of the third variety per kg will be

Choices

Choice (4)Response
a.Rs. 169.50
b.Rs. 180
c.Rs. 175.50
d.Rs. 170

Question 823

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MCQ▾

Factors of

Choices

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

Question 824

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Question

MCQ▾

If 3 is added to the denominator of a fraction, the fraction becomes 6. If 4 is added to the numerator, the fraction becomes 30, the fraction is ________.

Choices

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

Question 825

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Question

MCQ▾

A box contains 8 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 4 more black balls are put in the box, the probability of drawing a black ball is now double of what is was before, then x is________

Choices

Choice (4)Response
a.6
b.3
c.9
d.2

Question 826

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Question

MCQ▾

The option which is not a solution of the equation , is________

Choices

Choice (4)Response
a.(3,0)
b.(0,2)
c.(-3,4)
d.(1,1)

Question 827

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Question

MCQ▾

How many circles are there in the adjoining figure

Choices

Choice (4)Response
a.17
b.14
c.16
d.15