CBSE Class 3 Mathematics
NCERT Solutions
Chapter - 2
Fun With Numbers
NCERT Solutions
Chapter - 2
Fun With Numbers
PAGE 13
1. Radhika, Gauri, Vicky, Indre ans Sunil were collecting Imli (tamarind) seeds:
Ans. • Indra collected the most seeds.
• Sunil will collect 4 more seeds to be equal to Vicky.
• If Radhika gets 6 more seeds, she will have 30.
• How many children have more than 40 seeds? 3
• Gauri needs 3 more seeds to have 50.
• Sunil has 2 seeds less than 40 and Vicky has 2 seeds more than 40.
PAGE 15
2. Dhoni’s Century
One-day match between India and South Africa in Guwahati….., India batting first…..
Fill in the blanks:
Ans. Dhoni Scored 96 +6 =102 runs.
3. How many runs do these players need to complete a century?
Ans.
Runs scored
|
Runs needed to complete a century
| ||
Player 1
|
93
|
7
|
(
 100 – 93=7) |
Player 2
|
97
|
3
|
(
100 – 97=3) |
Player 3
|
89
|
11
|
(
100 – 89=11) |
Player 4
|
99
|
1
|
(
100 – 1=99) |
PAGE 16
4. Fill in the blanks:
Ans.
99-112
|
195-206
| ||
Number (in figures)
|
Number (in words)
|
Number (in figures)
|
Number (in words)
|
99
|
Ninety-nine
|
195
|
One hundred ninety five
|
100
|
One hundred
|
196
|
One hundred ninety six
|
101
|
One hundred one
|
197
|
One hundred ninety seven
|
102
|
One hundred two
|
198
|
One hundred ninety eight
|
103
|
One hundred three
|
199
|
One hundred ninety nine
|
104
|
One hundred four
|
200
|
Two hundred
|
105
|
One hundred five
|
201
|
Two hundred one
|
106
|
One hundred six
|
202
|
Two hundred two
|
107
|
One hundred seven
|
203
|
One hundred three
|
108
|
One hundred eight
|
204
|
One hundred four
|
109
|
One hundred nine
|
205
|
One hundred five
|
110
|
One hundred ten
|
206
|
One hundred six
|
111
|
One hundred eleven
| ||
112
|
One hundred twelve
|
5. Oh! 206! Guess how many more to make a triple century?
Ans. To make ripple century, runs needed = 300 – 206 = 94
PAGE 17
6. Top Ten Scores in the Cricket World Cup
Ans.
Player
|
Score
|
Player
|
Score
|
A.P.J.
|
128
|
M.D
|
178
|
A.S.
|
100
|
P.K.
|
105
|
C.K.
|
99
|
S.T.
|
141
|
D.M.
|
162
|
T.P.K
|
112
|
K.S.P.
|
152
|
V.V.S.
|
127
|
• C.K. Just missed his century. How many runs did he need to make a century?
Ans.1
• A.S. and C.K. scored almost equal runs.
• Most runs scored by any batsman are 178.
• A.S. and C.K. have a difference of just 1 run between them.
• K.S.P. scored 2 more than one and a half century.
PAGE 18
7.
Counting in 10’s
| |||
10
|
110
|
310
|
710
|
20
|
120
|
320
|
720
|
30
|
130
|
330
|
730
|
40
|
140
|
340
|
740
|
50
|
150
|
350
|
750
|
60
|
160
|
360
|
760
|
70
|
170
|
370
|
770
|
80
|
180
|
380
|
780
|
90
|
190
|
390
|
790
|
100
|
200
|
400
|
800
|
Counting in 50’s
| |
200
|
500
|
250
|
600
|
300
|
650
|
350
|
700
|
400
|
750
|
450
|
800
|
500
|
850
|
8. How far can you go like this?
Ans. I can go endlessly as there is no end to the numbers.
9. What is the biggest number you can call out?
Ans. The biggest number can never be called as there is no biggest number.
PAGE 19
10. Colour the Numbers. Find these numbers in the above chart. Colour them.
Ans.
Green
|
Red
|
Yellow
|
One hundred forty
|
Fifty-four
|
Four hundred forty-five
|
Two hundred two
|
Sixty
|
Sixteen
|
Two hundred sixty one
|
One hundred ninety five
|
One hundred fifty-nine
|
Eight hundred
|
Five hundred fifty-five
|
Six hundred eighty five
|
300 + 70 + 4
|
600 + 40 + 2
|
600 + 40 +9
|
600 + 50 + 6
|
100 + 70 + 9
|
70+ 4
|
5 + 50 +100
|
800 + 10
|
1+ 90 +80
|
Gabru, Bunny and Tarru are jumping all the way.
Gabru jumps on every 7th square, Bunny on every 5th square, Tarru on every 4th square. Gabru starts jumping from square number 90. Bunny starts jumping from square number 99. Tarru starts jumping from square number 106.
PAGE 21
Bunny’s tenth jump is on square number 149. Tarru’s tenth is on square number 146. Garbru’s tenth jump will be on square number 160. Gabru and Bunny both jump on squares 104, 139 and 174.
11. Find out:
(a) Tarru and Bunny jump on squares ____, _____, _____ and _____.
Ans. (a) 114, 134, 154 and 174.
(b) Is there any square where all three of them jump?
Ans.(b) 174.
(c) Guess how will finish in the least jumps?
Ans.(c) Gabru.
(d) In how many jumps?
Ans.(d) 12.
PAGE 22
Class, Jump!
12. (a) Jump 2 steps forward: 104, 106, 108.
Ans. (a) 104, 106, 108, 110, 112, 114, 116.
(b) Jumps 2 steps backward: 262, 260, 258.
Ans. (b) 262, 260, 258, 256, 254, 252, 250.
(c) Jumps 10 steps forward: 110, 120, 130.
Ans. (c) 110, 120, 130, 140, 150, 160, 170.
(d) Jumps 10 steps backward: 200, 190, 180.
Ans. (d) 200, 190, 180, 170, 160, 150, 140.
(e) Continue the pattern:
550, 560, 570.
910, 920, 930, 940.
209, 207, 205.
401, 402, 403.
Ans. (e) 550, 560, 570, 580, 590, 600, 610
910, 920, 930, 940, 950, 960, 970, 980
209, 207, 205, 203, 201, 199, 197
401, 402, 403, 404, 405, 406, 407.
PAGE 23
Lazy Crazy Shop
13. Lazy Crazy also has a crazy way of taking money. He takes only in Rs. 100, Rs. 10 and Rs. 1 coins.
Ans.
 |
Rs. 420
|
4 Rs 100 notes.
2 Rs 10 notes.
|
 |
Rs. 143
|
1 Re. 100 notes
4 Rs 10 notes
3 Re 1 coins
|
 |
Rs. 242
|
2 Rs. 100 notes,
4 Rs. 10 notes
2 Re 1 coins
|
 |
Rs. 55
|
5 Rs. 10 notes,
5 Re 1 coins
|
14. Who am I? Match with the number.
(a) I come between 40 and 50 and there is 5 in my name.
Ans. (a) 45.
(b) I have 9 in my name and am very close to 90.
Ans. (b) 89.
(c) If you hit a 4 after me, you score a century.
Ans. (c) 96.
(d) I am equal to ten notes of 10.
And. (d) 100.
(e) I am century + half century.
Ans. (e) 150.
(f) I am exactly in between 77 and 97.
Ans. (f) 87.
PAGE 25
15. How many are these?
(a)
Ans. (a) 240 rupees.
(b)
Ans. (b) 319 sticks.
(c)
Ans. (c) 212 blocks.
(d)
Ans. (d) 138 beads.
(e)
Ans. (e) 320 rupees.
