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Number System

Number System
A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number?

24
42
21
84

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2/3 x = 28 => x = 4242 * 1/2 = 21

Number System
In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ?

58
60
56
54

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.

Number System
The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number

636
845
724
673

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100  = 636

Number System
(444 x 44 x 4) ÷ 40 ?

2153.6
1953.6
1853.6
2053.6

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 444 x 44 x 4/40 = 1953.6

Number System
A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is:

27
24
22
30

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

27

Number System
A canteen requires 17 dozen of eggs per week. How many eggs will it require from January 1 to February 11 ?

987
820
1224
525

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number of days from Jan 1 to Feb 11th= 31 + 11 = 42 days = 6 weeks∴ Total eggs  =17 x 12 x 6 = 1224

MORE MCQ ON Number System

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