IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 817 - 821 of 931

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Question 817

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Question

MCQ▾

P, Q and R enter into partnership by making investments in the ratio. After a year, R invests another Rs. 452500 while P withdrew Rs. 65400. The ratio of investments then changes to . How much did R invest initially?

Choices

Choice (4)Response
a.Rs. 225899
b.Rs. 228900
c.Rs. 228990
d.Rs. 224516

Question 818

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Question

MCQ▾

The value of =________

Choices

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

Question 819

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Question

MCQ▾

There are three pillars X, Y and Z of different heights. Three spiders A, B and C start to climb on these pillars simultaneously. In one chance A climbs on X 5 cm but slips down 1 cm. B climbs on Y 6 cm but slips down 3 cm. C climbs on Z 7 cm but slips down 2 cm. if each requires 50 chances to reach the top of the pillar, what is the height of the shortest pillar?

Choices

Choice (4)Response
a.153 cm
b.152 cm
c.144 cm
d.141 cm

Question 820

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Question

MCQ▾

A group of 1200 persons consisting of captains and soldiers is travelling in a train. For every 15 soldiers there is one captain. The number of captains in the group is

Choices

Choice (4)Response
a.80
b.70
c.75
d.85

Question 821

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Question

MCQ▾

In a class test, in mathematics, 10 students scored 75 marks, 12 students scored 60 marks, 8 scored 40 marks and 3 scored 30 marks. The mean of their score is (approximately) ________

Choices

Choice (4)Response
a.57 marks
b.15 marks
c.56 marks
d.54 marks