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MATHS 1 Marks Question

Playing with Numbers · Gujarat Board (GSEB) STD 8 (GSEB - English Medium). 65 questions.

Questions · Page 2 of 2

1 Marks Question

Question 511 Mark
Test the divisibility of the following numbers by $10: 57930$
Answer
We know that a number is divisible by $10$ if its unit digit is $0. 57930$ The number $57930$ has $'0'$ at its unit's place so, it is not divisible by $10.$
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Question 521 Mark
Test the divisibility of the following numers by $3: 1693$
Answer
We know that a number is divisible by $3$ if the sum of its digits is divisible by $3$ if the sum of its digits is divisble by $3.$ Therefore,$1693 - 1 + 6 + 9 + 3 = 19,$ divisble by $3$
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Question 531 Mark
Test the divisibility of the following numers by $5: 77990$
Answer
We know that a number is divisible by $5$ its unit digit is $0$ or $5.$ Therefore, $77990$ The number $77990$ has $'0'$ at its unit's place so, it is divisible by $5.$
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Question 541 Mark
Test the divisibility of the following numbers by $9:$
$7524$
Answer
We know that a number is divisible by $9,$ if the sum of its digitals is divisible by $9.$
Therefore,
$7524$
$7 + 5 + 2 + 4 = 18,$ is divisible by $9.$
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Question 551 Mark
Test the divisibility of the following numbers by $9:$
$33333$
Answer
We know that a number is divisible by $9,$ if the sum of its digitals is divisible by $9.$
Therefore,
$33333$
$3 + 3 + 3 + 3 + 3 = 15,$ is not divisible by $9.$
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Question 561 Mark
Test the divisibility of the following numbers by $9: 14799$
Answer
We know that a number is divisible by $9,$ if the sum of its digitals is divisible by $9.$ Therefore, $14799 1 + 4 + 7 + 9 + 9 + 9 = 30,$ is not divisible by $9.$
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Question 571 Mark
Test the divisibility of the following numbers by $9:64302$
Answer
We know that a number is divisible by $9,$ if the sum of its digitals is divisible by $9. $ Therefore, $64302$
$6 + 4 + 3 + 0 + 2 = 15,$ is not divisible by $9.$
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Question 581 Mark
Test the divisibility of the following numers by $5: 1056$
Answer
We know that a number is divisible by $5$ its unit digit is $0$ or $5$. Therefore, $1056$ The number $1056$ has $'6'$ at its unit's place so, it is divisible by $5.$
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Question 591 Mark
Test the divisibility of the following numbers by $9:$
$30006$
Answer
We know that a number is divisible by $9,$ if the sum of its digitals is divisible by $9.$
Therefore,
$30006$
$3 + 0 + 0 + 0 + 6 = 9,$ is divisible by $9.$
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Question 601 Mark
Test the divisibility of the following numbers by $8:$
$7304$
Answer
A given number is divisible by $8$ only when the number formed by its last three digits is divisible by $8.$Therefore,
$7304,$ is divisible by $8$ as last three digits $304$ is not divisible by $8.$
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Question 611 Mark
Test the divisibility of the following numers by $3:$
$67035$
Answer
We know that a number is divisible by $3$ if the sum of its digits is divisible by $3$ if the sum of its digits is divisble by $3.$ Therefore,$67035 - 6 + 7 + 0 + 3 + 5 = 21,$ divisble by $3$
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Question 621 Mark
Test the divisibility of the following numers by $5: 55053$
Answer
We know that a number is divisible by $5$ its unit digit is $0$ or $5.$ Therefore, $55053$ The number $55053$ has $'3'$ at its unit's place so, it is divisible by $5.$
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Question 631 Mark
Test the divisibility of the following numbers by $8:154630$
Answer
A given number is divisible by $8$ only when the number formed by its last three digits is divisible by $8.$Therefore,
$154360,$ is divisible by $8$ as last three digits $360$ is not divisible by $8.$
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Question 641 Mark
Test the divisibility of the following numbers by $8:$
$998818$
Answer
A given number is divisible by $8$ only when the number formed by its last three digits is divisible by $8.$Therefore,
$998818,$ is not divisible by $8$ as last three digits $818$ is not divisible by $8.$
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Question 651 Mark
Test the divisibility of the following numers by $5: 470$
Answer
We know that a number is divisible by $5$ its unit digit is $0$ or $5.$ Therefore, $470$ The number $470$ has $'0'$ at its unit's place so, it is divisible by $5.$
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