1000+ Number System Questions and Answers for SSC Exams - 1
All natural numbers and 0 are called the _____ numbers.
All natural numbers and 0 are called the whole numbers.
If you subtract -1 from + 1, what will be the result?
(+1) – (- 1) = (+ 1 + 1) = 2.
If n and p are both odd numbers, which of the following is an even number?
(A) n + p
(B) n + P + 1
(C) np + 2
We know that the sum of two odd numbers is even.
Therefore, (n is odd, p is odd) ⇒ (n + p) is even.
If (n – 1) is an odd number, what are the two other odd numbers nearest to it?
(A) n, n – 1
(B) n, n – 2
(C) n – 3, n + 1
(D) n – 3, n + 5
(n – 1) is odd ⇒ (n – 1) – 2 and (n – 1) + 2 are odd.
⇒ (n – 3) and (n + 1) are odd.
Let S be the set of prime numbers greater than or equal to 2 and less than 100. Multiply all the elements of S. With how many consecutive zeros will the product end?
Clearly, the list of prime numbers from 2 to 99 has only 1 multiple of 2 and only 1 multiple of 5.
So, number of zeros in the product = 1.
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