Number System MCQs
Practice free Number System multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 807 questions — no login required.
Question 523easy
The sum of digits of a two-digit number is 12 and the difference between the two-digits of the two-digit number is 6. What is the-digit number ?
Question 524easy
7386038 is divisible by :
Question 525easy
The number of terms between 11 and 200 which are divisible by 7 but not by 3 are :
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Question 526easy
Unit's digit in (784)126 + (784)127 is :
Question 527easy
If n is any positive integer, 34n - 43n is always divisible by :
Question 528easy
When 10025 - 25 is written in decimal notation, the sum of its digits is :
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Question 529easy
Which is the greatest 5-digit number exactly divisible by 279 ?
Question 530easy
If p,q,r are all real numbers then (p - q)3 + (q - r)3 + (r - p)3 is equal to :
Question 531easy
The numbers 2272 and 875 are divided by a three-digit numbers N, giving the same remainder. The sum of the digits of N is :