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Number System

Number System
How many numbers up to 100 and 300 are divisible by 11?

21
18
20
22

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(300 – 100)/11 = 200/11 = 18 2/1118 Numbers

Number System
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:

None of these
40
30
20

ANSWER DOWNLOAD EXAMIANS APP

Number System
What should come in place of the question mark (?) in the given number series ? 888, 888, 444, 148, ?, 7.4

37
38
36
39

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let x be the missing number.Then888/888 = 1,888/444 = 2,444/148 = 3,148/x = 4= x = 148/4 = 37  and 37/7.4 = 5

Number System
(3² x 4² x 5) ÷ 36 = (?)² - 80

12
14
10
16

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10

Number System
The average of 7 consecutive even numbers A, B, C, D, E, F and G is 36. What is the product of ' C and 'E' ?

1168
1292
1468
1327

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

A + B + C + D + E + F + G/7 = 36Therefore, D = 36Therefore, C = 34,                             E = 38Therefore, Product = 34 x 38 = 1292

Number System
In how many different ways can the letters of the word 'FRUGAL'be arranged ?

660
720
556
515

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

In FRUGAL there ae six difference letters Therefore, 6 !                       = 6 x 5 x 4 x 3 x 2 x 1 = 720

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