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Number System

Number System
68375 + 72848 - ? = 34346 + 49569

58308
57308
59308
None of these

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 68375 + 72848 - 34346 - 49569 = 141223 - 83915 = 57308

Number System
The average of 7 consecutive even numbers A, B, C, D, E, F and G is 36. What is the product of ' C and 'E' ?

1168
1468
1327
1292

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

A + B + C + D + E + F + G/7 = 36Therefore, D = 36Therefore, C = 34,                             E = 38Therefore, Product = 34 x 38 = 1292

Number System
On multiplying a number by 7, the product is a number each of whose digits is 3. The smallest such number is:

47619
48619
47719
47649

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

By hit and trail, we find that47619 * 7 = 333333.7) 333333 (47619     333333----------------        0

Number System
What is the least number that should be added to 5200 to make it a perfect square ?

129
288
225
275

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.

Number System
Supply the missing figure : 2, 6, 12, 20, 30 ... 56

40
42
41
39

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

42

Number System
The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers?

296
252
388
344

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the four numbers be x, x + 2, x + 4 and x + 6.=> x + x + 2 + x + 4 + x + 6 = 36=> 4x + 12 = 36 => x = 6The numbers are 6, 8, 10 and 12.Sum of their squares = 62 + 82 + 102 + 122 = 36 + 64 + 100 + 144 = 344.

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