Whole numbers, integers, divisibility and place value.
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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
A number consists of three digits whose sum is 17. The middle digit is equal to the sum of the other two and the number will be increased by 594 if the digits are reversed. What is the number?
Q4 · Number System · MEDIUM
If a number 774958P8 is divisible by 88, then what is the value of P?
Q5 · 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?