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Number System

Number System
If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number.

86
94
91
97

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

94

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

8
16
12
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12

Number System
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ?

1
2
3
4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4

Number System
The square root of 0.0081 is:

0.009
0.91
0.9
0.09

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

0.09

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

660
720
515
556

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

Number System
Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999

480
490
485
495

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Required average score                    = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8                   = 3880 / 8                   = 485

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