


Problems On Numbers1
1.The average of first five multiples of seven will be.
3. If the sum of two numbers is 60 and their difference is 5, the difference between their squares will be.
4.The difference between the largest four digit number and the smallest four digit number will be.
5.The largest number,which divides (29^{2}  21 ^{2} ) completely will be.
6.A number is multiplied by 9 and then 9 is added to it. If such a number is completely divisible by 1, the smallest number will be.
7.What is the difference between the smallest four digit number and the difference between the smallest four digit number and the largest three digit number?
8.The number of prime factors in the expansion of (6) ^{10} x (7) ^{17} x (5) ^{55} x (11) ^{111} is .
9. If an even number is completely divisible by 9, the number will also be divided by which of the set of numbers?
10.If a two digit number is K times the sum of its numerals. How many times the number with reversed numerals will be of the sum of its numerals?
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Answers
1. 21 2. 15 3. 300 4. 8999 5. 400 6. 16 7. 101 8. 203 9. 2,3,6, and 18 10. 11  K

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