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Find the value of a and b if 476ab0 is divisible by both 3 and 11

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Important Questions on Playing with Numbers

EASY

Write the smallest digit in the blank space of the following number so that the number formed is divisible by 3:

 5_,945

MEDIUM
Test the divisibility of 1000001 by 11.
 
EASY
A number is divisible by 15. By what other numbers will that number be divisible?
EASY
18 is divisible by both 2 and 3. It is also divisible by 2×3=6. Similarly, a number is divisible by both 4 and 6. Can we say that the number must also be divisible by 4×6=24? If not, give an example to justify your answer.
MEDIUM

Give an example of a number that is divisible by 2 but not by 4.

MEDIUM
A number is divisible by 5 and 8 both. By which other number will that number be always divisible?
MEDIUM
Test the divisibility of the following number by 6.
2070
MEDIUM
The product of three consecutive numbers is always divisible by 6. Verify this statement with the help of some examples.
MEDIUM
Using divisibility tests, determine the number 297144 is divisible by 6 or not.
MEDIUM
The sum of two consecutive odd numbers is always divisible by 4. Verify this statement with the help of some examples.
MEDIUM

Write the digit in the blank space of the following number so that the number formed is divisible by 9:

 5,94,_84