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Number System

Number System
Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is:

6
10
5
4

ANSWER DOWNLOAD EXAMIANS APP

Number System
Find the smallest number which when divided by 13 and 16 leaves respective remainders of 2 and 5.

187
207
197
219

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let 'N' is the smallest number which divided by 13 and 16 leaves respective remainders of 2 and 5.Required number = (LCM of 13 and 16) - (common difference of divisors and remainders) = (208) - (11) = 197.

Number System
Sum of square of first number and cube of second number together is 568. Also square of the second number is 15 less than square of 8. What is the value of three-fifth of the first number ?

8
9
7
6

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the first number be x and the second number be y.∴ y² = 82 - 15 = 64 - 15 = 49∴ y = 7∴ x² + 73 = 568= x² + 343 = 568= x² + 568 - 343 = 225∴ x = √225 = 15∴ 15 x 3/5 = 9

Number System
1008÷36=?

27
26
28
25

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

28

Number System
7.98 x 3.75 + 1.28 x 15.5 = ?

49.765
47.765
46.765
48.765

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 29.925 + 19.84 = 49.765

Number System
If 2^(2x-1) = 8^(3-x), then the value of x is:

6
5
2
9

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2

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