Solved Questions on Abacus Representation (Numbers upto 1000)
1. What is 100 more than the number shown on the abacus?
a) 644
b) 564
c) 444
d) 344
Answer: c) 444
Explanation: For the abacus number 444:
The rightmost rod (one’s place) shows the digit 4. The second rightmost rod (tens place) shows the digit 4. The third rightmost rod (hundreds place) shows the digit 3. Therefore, the number represented by the abacus is 344.
To find 100 more than this number, we add 100 to it:
344 + 100 = 444
So, 100 is more than the number shown on the abacus is 444.
In this case, if the number shown on the abacus is 344, adding 100 to it gives us the value 444.
2. What is 50 less than the number shown on the abacus?
a) 482
b) 382
c) 252
d) 154
Answer: b) 382
Explanation: For the abacus number 432:
The rightmost rod (one’s place) shows the digit 2. The second rightmost rod (tens place)
shows the digit 3. The third rightmost rod (hundreds place) shows the digit 4.Therefore,
the number represented by the abacus is 432.
To find 50 less than this number, we subtract 50 from it:
432 - 50 = 382
So, 50 is less than the number shown on the abacus is 382.
3. If the abacus displays a number, what is the half value of it?
a) 212
b) 222
c) 232
d) 242
Answer: a) 212
Explanation: To find the half value of the number displayed on the abacus (424), we need to divide it by 2.
Dividing 424 by 2 gives us:
424 ÷ 2 = 212
So, the half value of the number displayed on the abacus is 212.
4. What is the number displayed on the abacus?
a) 345
b) 354
c) 453
d) 543
Answer: b) 354
Explanation: On an abacus, each rod represents a specific place value, such as ones, tens, hundreds, etc. In this case, we have a three-digit number and the abacus shows the digits 3, 5, and 4.
The rightmost rod (one’s place) shows the digit 4.
The second rightmost rod (tens place) shows the digit 5.
The third rightmost rod (hundreds place) shows the digit 3.
Therefore, the number represented by the abacus is 354.
5. If the abacus represents a number, what is the double of the number?
a) 442
b) 492
c) 500
d) 502
Answer: d) 502
Explanation: The rightmost rod (one’s place) shows the digit 1.
The second rightmost rod (tens place) shows the digit 5.
The third rightmost rod (hundreds place) shows the digit 2.
To calculate the double of the number, we multiply 251 by 2:
251 × 2 = 502
So, the double number represented by the abacus (251) is 502.
Worksheet on Abacus Representation (Numbers up to 1000)
1. What is the number displayed on the abacus?
a) 465
b) 524
c) 623
d) 728
Answer: c) 623
2. The abacus shows a number 478. What is the double of this number?
a) 956
b) 868
c) 856
d) 976
Answer: a) 956
3. What is 20 more than the number shown on the abacus?
a) 180
b) 200
c) 220
d) 230
Answer: c) 220
4. Find the number which is half of the number shown in abacus.
a) 263
b) 262
c) 263.5
d) 263.6
Answer: a) 263
5. What is 120 more than the number shown on the abacus?
a) 300
b) 340
c) 350
d) 460
Answer: d) 460
6. What is 250 more than the number shown on the abacus?
a) 800
b) 850
c) 900
d) 950
Answer: c) 900
7. The number displayed on the abacus is 592. What is half of the number?
a) 296
b) 284
c) 246
d) 241
Answer: a) 296
8. What is the number displayed on the abacus?
a) 236
b) 284
c) 289
d) 301
Answer: d) 301
9. What is the number displayed on the abacus?
a) 152
b) 165
c) 204
d) 215
Answer: b) 165
10. What is the number displayed on the abacus?
a) 502
b) 505
c) 602
d) 605
Answer: a) 502
