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 487easy
$$\frac{{{{\left( {489 + 375} \right)}^2} - {{\left( {489 - 375} \right)}^2}}}{{\left( {489 \times 375} \right)}} = ?$$
Question 488easy
If all the numbers from 501 to 700 are written, what is the total number of times the digit 6 appears ?
Question 489easy
The number (248 - 1) is exactly divisible by two numbers between 60 and 70. The numbers are :
Advertisement
Question 490easy
When the square of any odd number, greater than 1, is divided by 8, it always leaves remainder :
Question 491easy
If x = a (b - c), y = b (c - a), z = c (a - b), then the value of $${\left( {\frac{x}{a}} \right)^3}$$ $$ + {\left( {\frac{y}{b}} \right)^3}$$ $$ + {\left( {\frac{z}{c}} \right)^3}$$ is :
Question 492easy
The largest number that exactly divides each number of the sequence 15 - 1, 25 - 2, 35 - 3, ....., n5 - n, ..... is :
Advertisement
Question 493easy
$$\frac{{{{\left( {963 + 476} \right)}^2} + {{\left( {963 - 476} \right)}^2}}}{{\left( {963 \times 963 + 476 \times 476} \right)}} = ?$$
Question 494easy
Which one of the following numbers is divisible by 3 ?
Question 495easy
(96 + 1) when divided by 8, would leave a remainder of :