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Number System

Number System
How many numbers up to 100 are divisible by 7?

93
100
14
107

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

100/7 = 14 2/7 => 14 Numbers

Number System
One half of a two digit number exceeds its one third by 6. What is the sum of the digits of the number?

7
3
5
9

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x/2 – x/3 = 6=> x =63 + 6 = 9

Number System
The product of two consecutive odd numbers is 6723. Find is the greater number.

80
77
85
83

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the first odd number be x.Then, the other odd number would be x + 2.∴ x(x+2) = 6723= x2 + 2x = 6723= x2 + 2x = 6723= x2 + 2x - 6723 = 0= x2 + 83 - 81 x - 6723 = 0= x(x+83) - 81 (x + 83) = 0= (x + 83) (x - 81) = 0= (x + 83) (x - 81) = 0= x - 81 = 0∴ x = 81Hence, greater number = x + 2 = 81 + 2 = 83

Number System
Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number?

240
160
180
140

ANSWER DOWNLOAD EXAMIANS APP

Number System
Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is:

13
9
15
11

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the three integers be x, x + 2 and x+ 4.Then,3x = 2(x + 4) + 3x = 11Third integer = x + 4 = 15.

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

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