Mental Ability (NCO- Cyber Olympiad Class 7): Questions 149 - 154 of 205

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Question number: 149

» Mental Ability » Basic Statistics

Match List-Ⅰ List-Ⅱ▾

Question

Match the reciprocal of each of the following in exponential form:
List-Ⅰ List-Ⅱ

(A)

(9)3

(i)

(18)5

(B)

(25)4

(ii)

(19)3

(C)

(27)49

(iii)

(72)49

(D)

85

(iv)

(52)4

Choices

Choice (4) Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (iii)
  • (iv)
  • (ii)
  • (i)

b.

  • (ii)
  • (iv)
  • (iii)
  • (i)

c.

  • (ii)
  • (iii)
  • (iv)
  • (i)

d.

  • (i)
  • (iii)
  • (iv)
  • (ii)

Question number: 150

» Mental Ability » Number Games » Number Analogies

MCQ▾

Question

On dividing a number by 4, we get 3 as remainder. What will be the remainder, when the square of this number is divided by 4?

Choices

Choice (4) Response

a.

0

b.

1

c.

2

d.

5

Question number: 151

» Mental Ability » Basic Arithmetic

MCQ▾

Question

The present ages of three persons in proportions 2: 3: 4. Five years ago, the sum of their ages was 48. Find their present ages (in years).

Choices

Choice (4) Response

a.

16, 28, 26

b.

8, 20, 28

c.

14, 21, 28

d.

None of the above

Question number: 152

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Two poles 30 m and 15 m high stand upright in a ground. If their feet are 36 m apart, find the distance between tops.

Choices

Choice (4) Response

a.

30 m

b.

39 m

c.

35 m

d.

25 m

Question number: 153

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A boat covers a certain distance downstream in 2 hour, while it comes back in 1 12 hours. If the speed of the stream be 5 kmph, what is the speed of the boat in still water?

Choices

Choice (4) Response

a.

25 kmps

b.

35 kmps

c.

12 kmps

d.

11 kmps

Question number: 154

» Mental Ability » Basic Algebra

MCQ▾

Question

Step 1: x23x2y2+x2y22x23y2+12x2y2

Step 2: (x22x2)+(3x2y2+x2y2+12x2y2)3y2

Step 3: x2+10x2y23y2

Are the above given steps a simplification of algebraic expression x2(13y2)+x(xy22x)3y(y4x2y)?

Choices

Choice (4) Response

a.

Only step 1 is correct

b.

Only step 1 and 2 are correct

c.

No

d.

Yes

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