IMO- Mathematics Olympiad (SOF) Class 8: Questions 795 - 800 of 1030

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Question number: 795

» Everyday Mathematics

MCQ▾

Question

A ladder 10 meters long reaches a window which is 6 meters above the ground on one side of a street. Keeping its foot at the same point, the ladder is turned to other side of the street to reach a window 8 meters high. The width of the street is ________.

Choices

Choice (4) Response

a.

12 m

b.

14 m

c.

10 m

d.

11 m

Question number: 796

» Everyday Mathematics

MCQ▾

Question

The average age of 5 students is 70 years and their ages are in proportion 3: 5: 7: 9: 11, the age of youngest girl is________.

Choices

Choice (4) Response

a.

40 years

b.

10 years

c.

30 years

d.

35 years

Question number: 797

» Everyday Mathematics

MCQ▾

Question

Manoj earns 25000 per month. He spends on household items and on education of his children. The amount he saves is________.

Choices

Choice (4) Response

a.

Rs. 6700

b.

Rs. 5370

c.

Rs. 20,220

d.

Rs. 10,000

Question number: 798

» Everyday Mathematics

MCQ▾

Question

The ratio of boys and girls in Reena’s classes is 2: 3. Which of the following ratio is not equivalent to 2: 3?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 799

» Everyday Mathematics

MCQ▾

Question

Find the compound interest on Rs. 10,000 in 2 years at 4 % per annum, the interest being compounded half-yearly

Choices

Choice (4) Response

a.

Rs. 824.32

b.

Rs. 885.20

c.

Rs. 800

d.

Rs 825.23

Question number: 800

» Everyday Mathematics

MCQ▾

Question

Sixty- five percent of a number is 21 less than four- fifth of that number. What is the number?

Choices

Choice (4) Response

a.

140

b.

100

c.

150

d.

160

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