Number System - Last Digit of Power
CAT 1998 Slot 1 · Quantitative Ability · Easy · Number System
This is an easy Quantitative Ability question from the CAT 1998 Slot 1 paper. It tests Number System. The full answer key and a step-by-step explanation are below — try it yourself first, then reveal the solution.
What is the digit in the unit's place of ?
- A.
2
- B.
8
- C.
1
- D.
4
Answer
B
Explanation
Powers of 2 have a cyclicity of 4 in unit digits: 2, 4, 8, 6. . Therefore, the unit digit is .
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