CSAT Quiz – Number System 2

Number System

1. Integers are listed from 500 to 700. In how many integers is the sum of digits 6?

 
 
 
 

2. John started typing from 1. He typed till the largest 2 digit multiple of 17 and then gave the balance work to Lucy. If Lucy typed a total of 118 digits, what is the last number typed by Lucy?

 

 
 
 
 

3. How many numbers are there from 600 to 800 such that it has 7 in its hundredth place and tenth place

 
 
 
 

4. What is the sum of all digits that appear in all integers from 1 to 999

 
 
 
 

5. Consider the following Question and statements:

Question: Is the natural number X a prime number?

Statement 1: X is divisible by 3
Statement 2: X is divisible by 2

Which of the following is correct with respect to above given Questions and statements?

 
 
 
 

6. How many trailing zeroes (zeroes at the end of the number) does the expression 1x2x3x4x……x49x50 have?

 
 
 
 

7. Which of the following fractions is the smallest?

 

 
 
 
 

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