Class 8 > National Cyber Olympiad Class 8 > Olympiad Test: Mathematical Reasoning - 2

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Olympiad Test: Mathematical Reasoning - 2 - Question 1

There are deer and peacocks in a zoo. By counting heads they are 80. The number of their legs is 200. How many peacocks are there?

Olympiad Test: Mathematical Reasoning - 2 - Question 2

A waiter’s salary consists of his salary and tips. During one week his tips were 5/4 of his salary. What fraction of his income came from tips?

Olympiad Test: Mathematical Reasoning - 2 - Question 3

In a city, 40% of the adults are illiterate while 85% of the children are literate. If the ratio of the adults to that of the children is 2:3, then what percent of the population is literate ?

Olympiad Test: Mathematical Reasoning - 2 - Question 4

The statement “If x is divisible by 8, then it is divisible by 6” is false if x equals

Olympiad Test: Mathematical Reasoning - 2 - Question 5

In a class of 50 students, 18 take music, 26 take art, and 2 take both art and music. How many students in the class are not enrolled in either music or art

Olympiad Test: Mathematical Reasoning - 2 - Question 6

What is true about the statement “If two angles are right angles, the angles have equal measure” and its converse “If two angles have equal measure, then the two angles are right angles”?

Olympiad Test: Mathematical Reasoning - 2 - Question 7

Mary says “The number I am thinking is divisible by 2 or it is divisible by 3”. This statement is false if the number Mary is thinking of is

Olympiad Test: Mathematical Reasoning - 2 - Question 8

Which of the following is the converse of the statement: “If x > 4, then x + 2 > 5”?

Olympiad Test: Mathematical Reasoning - 2 - Question 9

The statement “x > 5 or x < 3” is true if x equals

Olympiad Test: Mathematical Reasoning - 2 - Question 10

Consider the sentence: x < 5

Which of the following integers makes this open sentence true?

Olympiad Test: Mathematical Reasoning - 2 - Question 11

The total of the ages of Amar, Akbar and Anthony is 80 years. What was the total of their ages three years ago?

Olympiad Test: Mathematical Reasoning - 2 - Question 12

What is the product of all the numbers in the dial of a telephone?

Olympiad Test: Mathematical Reasoning - 2 - Question 13

If you write down all the numbers from 1 to 100, then how many times do you write 3?

Olympiad Test: Mathematical Reasoning - 2 - Question 14

A pineapple costs ₹ 7 each. A watermelon costs ₹ 5 each. X spends ₹ 38 on these fruits. The number of pineapples purchased is

Olympiad Test: Mathematical Reasoning - 2 - Question 15

Between two book ends in your study are displayed your five favourite puzzle books. If you decide to arrange the five books in every possible combination and move just one book every minute, how long would it take you?

Olympiad Test: Mathematical Reasoning - 2 - Question 16

Olympiad Test: Mathematical Reasoning - 2 - Question 17

When Rahul was born, his father was 32 years older than his brother and his mother was 25 years older than his sister. If Rahul’s brother is 6 years older than him and his mother is 3 years younger than his father, how old was Rahul’s sister when he was born?

Olympiad Test: Mathematical Reasoning - 2 - Question 18

A man wears socks of two colours - black and brown. He has altogether 20 black socks and 20 brown socks in a drawer. Supposing he has to take out the socks in the dark, how many must he take out to be sure that he has a matching pair?

Olympiad Test: Mathematical Reasoning - 2 - Question 19

The number of boys in a class is three times the number of girls. Which one of the following numbers cannot represent the total number of children in the class?

Olympiad Test: Mathematical Reasoning - 2 - Question 20

A shepherd had 17 sheep. All but nine died. How many was he left with?

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