Related Questions

How many different numbers of two digits can be formed with the digits 1, 2, 3, 4, 5, 6; no digit being repeated?
A 40
B 30
C 35
D 45
how many 3digit numbers can be formed from digits 2,3,5,6,7 and 9 divisible by 5 and none of the digits is repeated?
A 5
B 10
C 15
D 20
Consider four digit numbers for which the first two digits are equal and the last two digits are also equal. How many such numbers are perfect squares?
A 2
B 4
C 0
D 1
E 3
A number consists of two digits. The sum of the digits is 9. If 63 is subtracted from the number its digits are interchanged. Find the number .
A 81
B 72
C 27
D 54
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and difference of the digits of the number if the ratio between the digits the number is 1 : 2?
A 4
B 8
C 16
D 24
A number consists of two digits. The sum of the digits is 10. If 72 is subtracted from the number, it's digits are interchanged. Find the number.
A 82
B 37
C 55
D 73
When you reverse the digits of the number 13, the number increases by 18. How many other two-digit numbers increase by 18 when their digits are reversed?
A 5
B 6
C 7
D 8
The sum of three digits x, y and z is 12 . What is the largest 3-digit number that can be found using each of the digits exactly once ?
A 912
B 921
C 930
D 1092
The different between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of its of that number ?
A 4
B 2
C 10
D 16
In a set of three numbers, the average of first two numbers is 2. The average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers ?
A 3
B 6
C 9
D 24

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