IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 794 - 799 of 1042

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Question 794

Question

MCQ▾

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.

11 m

c.

14 m

d.

10 m

Question 795

Question

MCQ▾

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.

30 years

b.

40 years

c.

35 years

d.

10 years

Question 796

Question

MCQ▾

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.

₹ 10,000

b.

₹ 6700

c.

₹ 20,220

d.

₹ 5370

Question 797

Question

MCQ▾

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 798

Question

MCQ▾

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

Choices

Choice (4)Response

a.

₹ 825.23

b.

₹ 885.20

c.

₹ 824.32

d.

₹ 800

Question 799

Question

MCQ▾

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.

160

c.

100

d.

150