5th Grade > Mathematics
PLAYING WITH NUMBERS MCQs
Total Questions : 40
| Page 2 of 4 pages
Answer: Option D. -> 106
:
D
1/29/09/013/3−1897––––––––––106––––––––––
:
D
1/29/09/013/3−1897––––––––––106––––––––––
Answer: Option D. -> 20
:
D
Weight of each pack of chips = 250 g
Total weight of the big pack = 5000 g
No of packets of chips with 250 g of chips
= 5000÷250
= 5000250
= 20packs
:
D
Weight of each pack of chips = 250 g
Total weight of the big pack = 5000 g
No of packets of chips with 250 g of chips
= 5000÷250
= 5000250
= 20packs
Answer: Option B. -> 2002
:
B
Only even numbers are divisible by 2. No odd number is divisible by 2. Hence 2002 is the number divisible by 2.
:
B
Only even numbers are divisible by 2. No odd number is divisible by 2. Hence 2002 is the number divisible by 2.
Answer: Option C. -> 91
:
C
The numbers between 40 and 50 that are exactly divisible by 7 ( those numbers that can be divided by 7, without leaving a remainder) are 42 and 49.
42=7×6
49=7×7
The sum of 42 and 49 is 91
42+49–––––91–––––
Hence "91" is the sum.
:
C
The numbers between 40 and 50 that are exactly divisible by 7 ( those numbers that can be divided by 7, without leaving a remainder) are 42 and 49.
42=7×6
49=7×7
The sum of 42 and 49 is 91
42+49–––––91–––––
Hence "91" is the sum.
Answer: Option D. -> 300
:
D
216 Increased by 93
=216+93–––––––––––––309––––––––––––
309 decreased by 9
=309−9––––––––––300––––––––––
Hence "300" is the answer.
:
D
216 Increased by 93
=216+93–––––––––––––309––––––––––––
309 decreased by 9
=309−9––––––––––300––––––––––
Hence "300" is the answer.
Answer: Option B. -> 4
:
B
21978 when reversed gives 87912. So the units digit of the product must be 2.
In the original number, the unitdigit is 8. To get 2 in the unitdigit in the product, 8 must be multiplied with either 4 or 9.
8×4=32 or 8×9=72
The tens digit in the reversed number 87912 is 1. To get that, we need to multiply by 4.
23139378×4––––––––––87912–––––––––––––
Hence, 21978 is multiplied by '4' to get a product where the digits are exactly reversed.
:
B
21978 when reversed gives 87912. So the units digit of the product must be 2.
In the original number, the unitdigit is 8. To get 2 in the unitdigit in the product, 8 must be multiplied with either 4 or 9.
8×4=32 or 8×9=72
The tens digit in the reversed number 87912 is 1. To get that, we need to multiply by 4.
23139378×4––––––––––87912–––––––––––––
Hence, 21978 is multiplied by '4' to get a product where the digits are exactly reversed.
Answer: Option B. -> Even
:
B
When any 2 even numbers are multiplied
eg. 2×8=16or12×12=144, the product is always an even number.
:
B
When any 2 even numbers are multiplied
eg. 2×8=16or12×12=144, the product is always an even number.
Answer: Option D. -> 6,8
:
D
The product of 2 whole numbers is 48.
Given below arethe pairs of factors of 48 and their sum.
1×4848+1=492×2424+2=263×1616+3=194×1212+4=166×88+6=14
Hence "6,8" are the possible numbers.
:
D
The product of 2 whole numbers is 48.
Given below arethe pairs of factors of 48 and their sum.
1×4848+1=492×2424+2=263×1616+3=194×1212+4=166×88+6=14
Hence "6,8" are the possible numbers.
Answer: Option A. -> 2,40,00,000
:
A
3460 × 7599
3460 can be rounded off to 3000,
as 3460 < 3500
7599 is rounded off to 8000,
as 7599 > 7500
Hence the estimate is
3000 × 8000
3 × 8 = 24 followed by 6 zeroes = 2,40,00,000
:
A
3460 × 7599
3460 can be rounded off to 3000,
as 3460 < 3500
7599 is rounded off to 8000,
as 7599 > 7500
Hence the estimate is
3000 × 8000
3 × 8 = 24 followed by 6 zeroes = 2,40,00,000
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