2 two digit numbers chosen in such a way that all 4 digits used are distinct, are such that their sum is 90. How many such pairs are possible if in both numbers units place is 1 more than tens place?
6 pairs 12 78 23 67 34 56 56 34 67 23 78 12
How many numbers can be formed from 1, 2, 3, 4, 5 (without repetition), when the digit at the units place must be greater than that in the ten's place?
The tens digit of a two digit number is two more than the ones digit. The number is 30 more than four times the sum of the digits. What is the number?
Many of our everyday words have more than one meaning. Below are five pairs of definitions; both definitions in each pair fit the same word. Can you guess them all? 1. Spend time idly or bread unit 2. Worker's organization or marriage. 3. Pine tree fruit or ice cream holder 4. Feeling of curiosity or savings account accrual 5. Land parcel or considerable quantity
