IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 552 - 556 of 968

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Question 552

Question

MCQ▾

Dharma got married 5 years ago. Today her age is times her age at the time of marriage. Her son՚s age is times her age. Her son՚s age is ________

Choices

Choice (4)Response

a.

13 years

b.

12 years

c.

10 years

d.

15 years

Question 553

Question

MCQ▾

One fourth of a head of cows is in the forest. Twice the square root of the head has gone to mountains, and of the remaining, 15 are on the bank of a river. The total number of cows is ________

Choices

Choice (4)Response

a.

6

b.

63

c.

36

d.

100

Question 554

Question

MCQ▾

P is thrice good a workman as Q and therefore is able to finish a job in 40 days less than Q. Working together they can do it in ________ days.

Choices

Choice (4)Response

a.

16

b.

15

c.

14

d.

10

Question 555

Question

MCQ▾

A girl calculates that the probability of her winning the first prize in a lottery is 0.15. If 8000 tickets are sold, how many tickets has she bought?

Choices

Choice (4)Response

a.

1400

b.

1800

c.

1200

d.

1600

Question 556

Question

MCQ▾

A man whose bowling average is 12.4 takes 5 wickets for 26 runs and thereby decreases his average by 0.4. The number of wickets, taken by him, before his last match, is ________

Choices

Choice (4)Response

a.

72

b.

85

c.

64

d.

78