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Number System

Number System
124, 235, 447, 760, 1174, ?

1489
1689
1589
1389

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

+111, +212, +313, +414

Number System
A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits?

8
60
12
7

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12

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

42
41
40
39

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

42

Number System
What is the difference between the largest number and the least number written with the figures 3, 4, 7, 0, 3?

43883
43893
43983
70983

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

74330 Largest30347 Smallest-------------43983

Number System
A basket contains 5 blue, 4 green and 3 red ball. If three balls are picked at random, what is the probability that at least one is red ?

32/51
31/58
37/52
34/55

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Probability of having no red ball is9C3 / 12C3 = 21/55Probability of having at least one red ball is 1 - 21/55 = 34/55

Number System
How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ?

56
52
48
36

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36

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