Playing with Numbers [IMO Level 1- Mathematics Olympiad (SOF) Class 8]: Questions 1 - 7 of 62

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Question 1

Playing with Numbers
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Question

MCQ▾

7849320 is divisible by________.

Choices

Choice (4)Response
a.10
b.9
c.3
d.None of the above

Question 2

Playing with Numbers
Edit

Question

MCQ▾

When a certain number is multiplied by 11, the product consists entirely of ones. The smallest such number is________.

Choices

Choice (4)Response
a.1011
b.1111
c.1009
d.1010

Question 3

Playing with Numbers
Edit

Question

MCQ▾

If is divisible by 3, where z is a digit less than 5, then the values of z are________.

Choices

Choice (4)Response
a.1,2
b.1,0
c.0,3
d.3,1

Question 4

Playing with Numbers
Edit

Question

MCQ▾

If in a number difference between the sum of digits at its odd places and that of digits at the even places is given 0, then the number and difference is divisible by________.

Choices

Choice (4)Response
a.2
b.11
c.7
d.9

Question 5

Playing with Numbers
Edit

Question

MCQ▾

In a division sum, the divisor is 12 times the quotient and 5 times the remainder. If the remainder is 48, then dividend is________.

Choices

Choice (4)Response
a.2424
b.8484
c.4848
d.2021

Question 6

Playing with Numbers
Edit

Question

MCQ▾

On dividing 12401 by a certain number, we get 76 as quotient and 13 as remainder. What is the divisor?

Choices

Choice (4)Response
a.166
b.160
c.163
d.165

Question 7

Playing with Numbers
Edit

Question

MCQ▾

14321 is divisible by________.

Choices

Choice (4)Response
a.9
b.3
c.4
d.None of the above