Mental Ability-Basic Arithmetic (NCO- Cyber Olympiad Class 9): Questions 14 - 19 of 49

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Question number: 14

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A truck travels 540 km from Surat to Ahmedabad at 54 km per hour but returns the same distance at 36 km per hour. The average speed for the round trip is closest to

Choices

Choice (4) Response
a.

35km/hr

b.

34km/hr

c.

44km/hr

d.

43 km/hr

Question number: 15

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Ramila got married 7 years ago. Today her age is 113 times her age at the time of marriage. Her son’s age is (110) times her age. Her son’s age is________

Choices

Choice (4) Response
a.

2.8 years

b.

5 years

c.

4.1 years

d.

3.3 years

Question number: 16

» Mental Ability » Basic Arithmetic

MCQ▾

Question

Three years ago the average age of P and Q was 16 years. With R joining them, the average becomes 20 years. How old is R now?

Choices

Choice (4) Response
a.

22 years

b.

34 years

c.

45 years

d.

12 years

Question number: 17

» Mental Ability » Basic Arithmetic

MCQ▾

Question

A man had 25 lamps. All but 15 broken, how many were left with him?

Choices

Choice (4) Response
a.

18

b.

7

c.

15

d.

10

Question number: 18

» Mental Ability » Basic Arithmetic

MCQ▾

Question

In three colored boxes-pink purple, cyan orange and yellow aqua 180 balls are placed. There are twice as many balls in the orange and purple boxes combined as there are in the aqua box and twice as many in the aqua as there are in the purple box. How many balls are there in the orange box?

Choices

Choice (4) Response
a.

60

b.

90

c.

46

d.

30

Question number: 19

» Mental Ability » Basic Arithmetic

MCQ▾

Question

How many liters of 50% silicon solution should be added to 70 liters of a 30% silicon solution to make a 40% solution?

Choices

Choice (4) Response
a.

70 liters

b.

80 liters

c.

10 liters

d.

20 liters

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