Playing with Numbers [IMO Level 1- Mathematics Olympiad (SOF) Class 8]: Questions 1 - 7 of 62
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Question 1
Question
MCQ▾7849320 is divisible by________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 10 | |
| b. | 9 | |
| c. | 3 | |
| d. | None of the above | |
Question 2
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
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
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
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
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 | |