Exercise 2.1:
Write the successor of:
a) 359
Answer: 360
b) 999
Answer: 1000
c) 10999
Answer: 11000
Write the predecessor of:
a) 728
Answer: 727
b) 1001
Answer: 1000
c) 10001
Answer: 10000
Write the number names of the following:
a) 9801
Answer: Nine thousand eight hundred one
b) 40005
Answer: Forty thousand five
c) 503008
Answer: Five lakh three thousand eight
Exercise 2.2:
Write the smallest 5-digit number and the greatest 6-digit number.
Answer: Smallest 5-digit number: 10000, Greatest 6-digit number: 999999
Write the successor and predecessor of:
a) 19999
Answer: Predecessor: 19998, Successor: 20000
b) 1000000
Answer: Predecessor: 999999, Successor: 1000001
c) 999999
Answer: Predecessor: 999998, Successor: 1000000
Write the place value and face value of the underlined digit in the following numbers:
a) 7692 (9)
Answer: Face value: 9, Place value: 900
b) 80203 (2)
Answer: Face value: 2, Place value: 2000
c) 700000 (7)
Answer: Face value: 7, Place value: 700000
Write the number names of:
a) 90001
Answer: Ninety thousand one
b) 300000
Answer: Three lakh
c) 607084
Answer: Six lakh seven thousand eighty-four
Insert commas in the correct places and write the numerals:
a) Thirty-eight lakh seventy-two thousand nine hundred six
Answer: 38,72,906
b) Two crore five lakh sixty-four
Answer: 2,05,00,064
c) Seven crore four lakh thirty thousand five
Answer: 7,04,30,005
Exercise 2.3:
Write the Roman numeral for the given numbers:
a) 49
Answer: XLIX
b) 365
Answer: CCCLXV
c) 999
Answer: CMXCIX
Write the Hindu-Arabic numerals for the given Roman numerals:
a) LXXIV
Answer: 74
b) CCXXXVI
Answer: 236
c) DCCCXC
Answer: 890
Write the predecessor and successor of:
a) 999
Answer: Predecessor: 998, Successor: 1000
b) 1000
Answer: Predecessor: 999, Successor: 1001
c) 1,00,000
Answer: Predecessor: 99,999, Successor: 1,00,001
Write the greatest 3-digit number and the smallest 4-digit number using the digits 2, 5, 7, 9 without repetition.
Answer: Greatest 3-digit number: 975, Smallest 4-digit number: 2579
Write the place value and face value of the digit 7 in the number 8754.
Answer: Place value: 700, Face value: 7
