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Question 1 of 10
1. Question
The difference of predecessor and successor of a number is always
Correct
AWESOME!
Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 2 
Question 2 of 10
2. Question
Which set is written correctly in descending order?
Correct
EXCELLENT!
Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 2543, 2453, 2354, 2345 
Question 3 of 10
3. Question
How many hundreds are there in 4890 ?
Correct
WELL DONE!
Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 8 
Question 4 of 10
4. Question
The successor of 3456 is
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Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 3457 
Question 5 of 10
5. Question
Which of the following set is in ascending order?
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Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 1234 , 2134 , 3214 , 4321 
Question 6 of 10
6. Question
The successor of 2999 is
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Incorrect
font color = “red”> OOPS! INCORRECT ANSWER
Correct Answer: 3000 
Question 7 of 10
7. Question
Using digits 1,0,3,4 make the greatest 4digit number without repetition
Correct
EXCELLENT!
Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 4310 
Question 8 of 10
8. Question
Make the smallest 4digit number using digits 5,6,3,0
Correct
SUPERB!
Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 3056 
Question 9 of 10
9. Question
How many three digit numbers can be formed by digits 2, 5, 7 without repetition
Correct
WELL DONE!
Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 6
Explanation:Number of three digit numbers can be formed by digits 2, 5, 7 without repetition = 3 X 2 X 1 = 6
Hundreds Place can be filled using any of the three digits.
Tens place can take any of the two digits left
One place can only the left one digit 
Question 10 of 10
10. Question
How many four digit numbers can be formed by using digits 3,8,9,1 using each digit only once
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AWESOME!
Incorrect
OOPS! INCORRECT ANSWER
Correct Answer: 24
Explanation: Number of four digit numbers can be formed by using digits 3,8,9,1 using each digit only once = 4 X 3 X 2 X 1 = 24