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Number System
Whole numbers, integers, divisibility and place value.
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Take a full mock →Q1 · Number System · EASY
A number when divided by 12 leaves remainder 7. What will be the remainder when the same number is divided by 6?
Q2 · Number System · MEDIUM
The sum of a two-digit number and the number obtained by reversing its digits is 121. If the unit digit is 5 more than the tens digit, what is the original number?
Q3 · Number System · HARD
In a four-digit number, the sum of the first two digits is equal to that of the last two digits. The sum of the first and last digits is equal to the third digit. Finally, the sum of the second and fourth digits is twice the sum of the other two digits. What is the third digit of the number?
Q4 · Number System · EASY
What is the smallest 4-digit number that is divisible by both 12 and 15?
Q5 · Number System · HARD
The sum of the digits of a two-digit number is 11. If the digits are reversed, the new number is 27 more than the original number. What is the original number?