Number System
If the sum of 4 consecutive odd numbers is 104, what will be the third number if they are arranged in ascending order ?

27
29
28
30

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Number System
The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?

Cannot be determined
96
78
69

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Number System
A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ?

27/143
30/146
28/144
29/145

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Number System
The difference between a two-digit number and the number obtained by interchanging the digit is 36. What is the difference between the sum and the difference of the digits of the number if the ratio b

16
4
8
None of these

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