Number System

MULTIPLE CHOICE QUESTIONS

Q1: The place value of 7 in the numeral 25,79,206 is

Step 1: The digit 7 is in the ten-thousands place.
Step 2: Place value = 7 × 10,000 = 70,000
Correct Answer: c. 70,000

Q2: The face value of 4 in the numeral 36,43,908 is

Step 1: Face value means the digit itself.
Step 2: Face value of 4 = 4
Correct Answer: b. 4

Q3: The difference between the place-value and the face value of 6 in the numeral 32,53,619 is

Step 1: 6 is in the hundreds place → Place value = 6 × 100 = 600
Step 2: Face value = 6
Step 3: Difference = 600 – 6 = 594
Correct Answer: b. 594

Q4: The smallest counting number is

Step 1: Counting starts from 1
Correct Answer: b. 1

Q5: The whole number whose successor is 53,100 is

Step 1: Let the number be x
Step 2: x + 1 = 53,100 → x = 53,099
Correct Answer: b. 53,099

Q6: The difference between the largest number of 3-digits and the smallest number of 3-digits formed by the digits 3, 0 and 8 is

Step 1: Largest = 830
Step 2: Smallest = 308
Step 3: Difference = 830 – 308 = 522
Correct Answer: c. 522

Q7: How many 7 digit numbers are there in all?

Step 1: Smallest = 10,00,000
Step 2: Largest = 99,99,999
Step 3: Total = 99,99,999 – 9,99,999 = 90,00,000
Correct Answer: a. 90,00,000

Q8: What comes just before 10,00,000?

Step 1: 10,00,000 – 1 = 9,99,999
Correct Answer: c. 9,99,999

Q9: The largest number of 4 digits which is exactly divisible by 25 is

Step 1: Largest 4-digit number = 9999
Step 2: Divide 9999 ÷ 25 = 399.96
Step 3: 399 × 25 = 9975
Correct Answer: d. 9,975

Q10: The number which when divided by 23 gives 17 as quotient and 19 as remainder, is

Step 1: Use formula: Dividend = Divisor × Quotient + Remainder
Step 2: = 23 × 17 + 19 = 391 + 19 = 410
Correct Answer: d. None of these (Correct is 410)

Q11: The sum of the successor and the predecessor of a number is 1326. The number is

Step 1: Let number be x
Step 2: (x – 1) + (x + 1) = 1326 → 2x = 1326 → x = 663
Correct Answer: a. 663