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 397easy
For an integer n, n! = n(n - 1) (n - 2) ..... 3.2.1 Then, 1! + 2! + 3! +.....+ 100!, when divided by 5 leaves remainder
Question 398easy
A number is multiplied by 11 and 11 is added to the product. If the resulting number is divisible by 13, the smallest original number is = ?
Question 399easy
The smallest prime number, that is the fifth term of an increasing arithmetic sequence in which all the four preceding terms are also prime, is -
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Question 400easy
Among the following statements, the statement which is not correct is :
Question 401easy
Which of the following digits will replace the H marks in the following equation ? 9H + H8 + H6 = 230
Question 402easy
What least number must be added to 1056 to get a number exactly divisible by 23 ?
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Question 403easy
If a and b are positive integers, a > b and (a + b)2 - (a - b)2 > 29 Then the smallest value of a is -
Question 404easy
The digit in the unit's place of the number (67)25 - 1 must be -
Question 405easy
287 × 287 + 269 × 269 - 2 × 287 × 269 = ?