IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 822 - 826 of 1042

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Question 822

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Question

MCQ▾

Roshni’s age after 15 years will be 5 times his age 5 years back. What is the present age of Roshni?

Choices

Choice (4)Response
a.25 years
b.10 years
c.20 years
d.30 years

Question 823

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Question

MCQ▾

The average age of 2 boys is 14 years and their ages are in proportion 2: 5, the age of youngest girl is________.

Choices

Choice (4)Response
a.8 years
b.9 years
c.10 years
d.4 years

Question 824

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Question

MCQ▾

If the cost price is 96 % of the selling price, then what is the profit percentage?

Choices

Choice (4)Response
a.4.17%
b.4.25%
c.5%
d.6.23%

Question 825

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Question

MCQ▾

A roofer’s 29 feet ladder is against the side of a house. It is 7 yards from the ground to the top of the house. How far away from the house must he place the foot of the ladder in order to have the top of the ladder meet the roof of the house?

Choices

Choice (4)Response
a.10 feet
b.25 feet
c.15 feet
d.20 feet

Question 826

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Question

MCQ▾

The ages of two persons differ by 16 years. If 6 years ago the elder one be 3 times as old as the younger one, find their present ages.

Choices

Choice (4)Response
a.14 years, 30 years
b.15 years, 30 years
c.12 years, 25 years
d.Question does not provide sufficient data or is vague