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प्रश्न
Which of the following statement is true?
If two numbers are co-prime, at least one of them must be a prime number.
विकल्प
True
False
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उत्तर
False
Example: 4 and 9 are co-prime numbers but both are composite numbers too.
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संबंधित प्रश्न
Given an example of a number which is divisible by 2 but not by 4.
Given an example of a number which is divisible by 4 but not by 8.
Now, look at this —
Check if it is true or not.
Now you try and change these numbers into special numbers —
132
The difference of a two-digit number and the number obtained by reversing its digits is always divisible by ______.
The difference of three-digit number and the number obtained by putting the digits in reverse order is always divisible by 9 and ______.
A four-digit number abcd is divisible by 11, if d + b = ______ or ______.
If a number a is divisible by b, then it must be divisible by each factor of b.
If AB × 4 = 192, then A + B = 7.
If 56 × 32y is divisible by 18, find the least value of y.
