Prove that √5 is an irrational number.
Prove that √3 is an irrational number.
The factor tree of a number x is shown below : Find the values of x, y, a and b. Hence, write the product of the prime factors of the number x so obtained.
If the number aⁿ, where n is a natural number, always ends with digit a, then the possible value of 'a' is :
3ⁿ, where n is a natural number, cannot end with the digit :
A prime number has :
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