Mental Ability (NCO- Cyber Olympiad Class 9): Questions 74 - 79 of 219

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Question number: 74

» Mental Ability » Basic Algebra

MCQ▾

Question

When simplified and expressed with negative exponents, the expression (x+y)2(x2+y2) is equal to

Choices

Choice (4) Response

a.

x2+y2

b.

x2+21x1y1+y2

c.

(x2+21x1y1+y2)(y2+x2)(x2y2)

d.

(x2y2)(x2+21x1y1+y2)y2+x2

Question number: 75

» Mental Ability » Basic Algebra

MCQ▾

Question

If m=XYZ(XYYZ) then Z equals

Choices

Choice (4) Response

a.

m1 + YZ

b.

XYZ-mX-m

c.

m(XY-Y)ZX

d.

mXX + M

Question number: 76

» Mental Ability » Basic Arithmetic

MCQ▾

Question

logp+logq=log(p+q) Only if

Choices

Choice (4) Response

a.

p=qq1

b.

p=q=1

c.

p=q=0

d.

p=q21q

Question number: 77

» Mental Ability » Basic Arithmetic

MCQ▾

Question

In three colored boxes-red, green and blue 120 balls are placed. There are twice as many balls in the green and red boxes combined as there are in the blue box and twice as many in the blue as there are in the red box. How many balls are there in the green box?

Choices

Choice (4) Response

a.

54

b.

36

c.

45

d.

None of the above

Question number: 78

» Mental Ability » Basic Arithmetic

MCQ▾

Question

This question 2n+42(2n)2(2n+3) when simplified is

Choices

Choice (4) Response

a.

12n

b.

2n+1

c.

2n+118

d.

78

Question number: 79

» Mental Ability » Number Games » Number Series

MCQ▾

Question

32, 31, 33, 32, 34, 33, ________ what number should come next?

Choices

Choice (4) Response

a.

35

b.

34

c.

36

d.

32

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