IMO- Mathematics Olympiad Class 10: Questions 515 - 519 of 958

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Question number: 515

» Everyday Mathematics

MCQ▾

Question

Kamla got married 6 years ago. Today her age is Equation times her age at the time of marriage. Her son’s age is Equation times her age. Her son’s age is ________

Choices

Choice (4) Response

a.

5 years

b.

3 years

c.

4 years

d.

2 years

Question number: 516

» Everyday Mathematics

MCQ▾

Question

2 men and 7 boys can do a piece of work in 14 day, 3 men and 8 boys can do the same in 11 days. 8 men and 6 boys can do 3 times the amount of this work in ________

Choices

Choice (4) Response

a.

18 days

b.

36 days

c.

24 days

d.

21 days

Question number: 517

» Everyday Mathematics

MCQ▾

Question

P is twice good a workman as Q and therefore is able to finish a job in 30 days less than Q. Working together they can do it in ________ days.

Choices

Choice (4) Response

a.

40

b.

50

c.

20

d.

30

Question number: 518

» Real Numbers

MCQ▾

Question

28 integers are chosen from the interval [104, 208]. Show that there exit two of them having a common prime divisor.

Choices

Choice (4) Response

a.

2

b.

0

c.

3

d.

1

Question number: 519

» Everyday Mathematics

MCQ▾

Question

One year ago the ratio between Laxman’s and Gopal’s salary wasEquation . The ratios of their individual salaries between last year’s and this year’s salaries are Equation and Equation respectively. At present, the total of their salary is Rs. 4160. The salary of Laxman now, is ________

Choices

Choice (4) Response

a.

Rs. 3120

b.

Rs. 1600

c.

Rs. 2560

d.

Rs. 1040

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