Mental Ability (NCO- Cyber Olympiad Class 9): Questions 126 - 132 of 219

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Question number: 126

» Mental Ability » Basic Algebra

MCQ▾

Question

What is equivalent to (15abc2)(2a3b4) ?

Choices

Choice (4) Response

a.

20a5b9c

b.

30a4b5c2

c.

a5b9

d.

10abc

Question number: 127

» Mental Ability » Ranking Test

MCQ▾

Question

Avinash is Ravi’s eldest brother. Ravi is younger than Ajay. Ravi and Ajay are not brothers. Which of the following statements is definitely true?

Choices

Choice (4) Response

a.

Ajay is younger than Avinash

b.

Avinash is younger than Ajay

c.

Ajay is younger than Ravi

d.

None of the above

Question number: 128

» Mental Ability » Basic Algebra

MCQ▾

Question

If x+1x=3 , find the value of x6+1x6

Choices

Choice (4) Response

a.

322

b.

324

c.

323

d.

325

Question number: 129

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Given 2=1.2 , 3=1.8 , 4=3.2 and 5=2.5 find the value of the following expression correct up to three places of decimal: 2+34+52345 .

Choices

Choice (4) Response

a.

-17

b.

-12

c.

-10

d.

-30

Question number: 130

» Mental Ability » Basic Algebra

MCQ▾

Question

(ab)(a+b)(a2+b2) is a factorization product of

Choices

Choice (4) Response

a.

(a4b4)

b.

(a6b6)

c.

(a7b7)

d.

(a5b5)

Question number: 131

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Divide 45 among four parts such that 2 added to first part, 2 subtracted from second part, third multiplied by 2 and the fourth divided by2 are all equal.

Choices

Choice (4) Response

a.

5, 8, 12, 20

b.

8, 12, 5, 20

c.

12, 8, 5, 20

d.

20, 5, 8, 12

Question number: 132

» Mental Ability » Basic Algebra

MCQ▾

Question

Arpna cut a cake in two equal parts and one of these two pieces is again cut into equal parts. Each small part is of 20 grams. If there are seven parts of the whole cake, what was the weight of the original cake?

Choices

Choice (4) Response

a.

280 grams

b.

240 grams

c.

120 grams

d.

140 grams

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