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Number System

Number System
What number should replace both the question marks (?) in the following question ?

84
83
82
85

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

84

Number System
4.78% of 1255 + 3.24% of 440=0.5% of ?

14849
12849
13849
11849

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

0.5 x ?/100 = 4.78 x 1255/100 + 3.24 x 440/100= 59.989 + 14.256∴ ? = 74.245 x 100/0.5 = 14849

Number System
What value should come in place of ? in the given number series ? 15, 51, 162, 498, 1509, ?

7878
5656
4545
3434

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

15, (15 + 2) x 3 = 51,(51 + 3) x 3 = 162, (162 + 4) x 3 = 498, (498 + 5) x 3 = 1509(1509 + 6) x 3 = 4545

Number System
On dividing 2272 as well as 875 by 3-digit number N, we get the same remainder. The sum of the digits of N is:

10
13
11
12

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Clearly, (2272 - 875) = 1397, is exactly divisible by N.Now. 1397 = 11 * 127The required 3-digit number is 127, the sum of whose digit is 10.

Number System
16.23 x 12.9 + 17.32 = ?

246.687
None of these
226.687
236.687

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687

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:

22
24
27
30

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

27

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