(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Indices and Surds
(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Indices and Surds
1. Determine a possible value of x from the equation 5x–2 × 23x/x+1 = 4.
(a) 0
(b) 4
(c) 2
(d) 3
2. The least value of 3x + 3–x is
(a) 2
(b) 1
(c) 0
(d) 2/3
3.
![](https://rrbexamportal.com/sites/default/files/RRB-NTPC-Tier-2-Numerical-Aptitude-Indices-and-Surds.jpg)
4. If a = –5 and b = –6, find the value of (a – b)b–a + (b – a)a–b.
(a) 1
(b) –1
(c) 0
(d) –2
5. In Republic Day Parade, 6440 NCC cadets were asked to stand in rows to form a perfect square. It was found that 40 NCC cadets were left out. What was the number of NCC cadets in each row?
(a) 40
(b) 80
(c) 64
(d) 60
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