Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 6): Questions 9 - 15 of 268

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Question number: 9

» Mental Ability » Basic Arithmetic

MCQ▾

Question

12 is equivalent to ________.

Choices

Choice (4) Response

a.

50%

b.

60%

c.

35%

d.

45%

Question number: 10

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Which set of numbers is the prime factorization of 126?

Choices

Choice (4) Response

a.

(2×3×3×7)

b.

( 7×7×2×3)

c.

(2 × 5 × 3 × 3)

d.

(2×5×3×7)

Question number: 11

» 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: 12

» 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: 13

» 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: 14

» 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: 15

» 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

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