Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 9): Questions 27 - 31 of 49

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Question number: 27

» 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: 28

» 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: 29

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Question 5n+35(5n+1)5(5n+3) when simplified is

Choices

Choice (4) Response

a.

5n+2115

b.

5+5n

c.

45

d.

5n+1

Question number: 30

» Mental Ability » Basic Arithmetic

MCQ▾

Question

In three colored boxes-pink, cyan and yellow 240 balls are placed. There are thrice as many balls in the cyan, pink boxes combined as there are in the yellow box, and twice as many in the yellow as there are in the pink box. How many balls are there in the yellow box?

Choices

Choice (4) Response

a.

36

b.

50

c.

60

d.

30

Question number: 31

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Divide 116 among four parts such that 5 added to first part, 4 subtracted from second part, third multiplied by 3 and the fourth divided by2 are all equal.

Choices

Choice (4) Response

a.

24, 36, 72, 90

b.

22, 31, 9, 54

c.

15, 30, 45, 60

d.

32, 21, 9, 60

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