1. If m and n are positive integers and (m – n) is an even number, then (m^2-n^2 ) will always be divisible by: (1)
- 1. 4
- 2. 6
- 3. 8
- 4. 12
2. Two number are such that their difference, their sum and their product are in the ratio of 1:7:24. The product of the numbers is: (3)
- 1. 24
- 2. 36
- 3. 48
- 4. 60
3. The digits indicated by * in 3422213** so that this number is divisible by 99 are: (1)
- 1. 1, 9
- 2. 3, 7
- 3. 4, 6
- 4. 5, 5
4. Find out the last digit 3^41×4^19×5^17 ? (2)
- 1. 5
- 2. 0
- 3. 1
- 4. 2
5. Find out the number of different factor of 86400? (1)
- 1. 96
- 2. 128
- 3. 72
- 4. 112
