Mental Ability (NCO- Cyber Olympiad Class 6): Questions 16 - 21 of 394

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Question number: 16

» Mental Ability » Basic Arithmetic

MCQ▾

Question

L. C. M. of 81 and 54 is ________.

Choices

Choice (4) Response

a.

81

b.

162

c.

54

d.

27

Question number: 17

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Find the prime number from given numbers.

Choices

Choice (4) Response

a.

27

b.

69

c.

23

d.

39

Question number: 18

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A basket contains 300 mangoes. 75 mangos were distributed among students. The percentage of mangoes left in the basket is ________.

Choices

Choice (4) Response

a.

75%

b.

30%

c.

25%

d.

50%

Question number: 19

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Harsh is learning mathematics, he has X number then he multiply the number by 7 and subtract 9 from the answer. Starting with X, how can he get his original number back?

Choices

Choice (4) Response

a.

Divide X by 7 and then add 9 to the result

b.

Add 9 to X and then divide the resulting number by 7

c.

Subtract 9 from answer and then multiply the result by 7

d.

Multiply X by 9 and then subtract 7 from the result

Question number: 20

» Mental Ability » Basic Arithmetic

MCQ▾

Question

HCF of two numbers is ________.

Choices

Choice (4) Response

a.

The greatest number which divides each number exactly

b.

The greatest number exactly divisible by each number

c.

(The product of two numbers) ÷ their LCM

d.

Both a. and c. are correct

Question number: 21

» Mental Ability » Ranking Test

MCQ▾

Question

Which pair of numbers represents the greatest and the least numbers in the following set?

{0, 7, 2, 0.08, 1.69, 1.8}

Choices

Choice (4) Response

a.

{1.69, 0.08}

b.

{2, 0.7}

c.

{2, 0.08}

d.

{1, 8, 2}

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