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Number System

Number System
35%of ?=242

394
693
542
487

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

693

Number System
(2560 x 1.4) +(7400 x 0.6) =?

9160
8024
6543
7234

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8024

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:

20
None of these
40
30

ANSWER DOWNLOAD EXAMIANS APP

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

93
100
107
14

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

100/7 = 14 2/7 => 14 Numbers

Number System
What least number shall be added to 4700 to make it a perfect square ?

81
71
61
91

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.

Number System
A number consists of 3 digit whose sum is 10. The middle digit is equal to the sum of the other two and the number will be increased by 99 if its digits are reversed. The number is:

145
370
352
253

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the middle digit be x. Then, 2x = 10 or x = 5.So, the number is either 253 or 352. Since the number increases on reversing the digits, so the hundred's digit is smaller than the unit's digit. Hence, required number = 253.

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