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• 1.  A rational number between 3 and 3 is 4 8
A.  12 7
B.  7 3
C.  16 9
D.  9 16
Ans
D
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• 2.
Find the largest number, which exactly divides every number of the form (n3 – n) (n – 2) where n is a natural number greater than 2.
 A. 6 B. 12 C. 24 D. 48
Ans
C
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• 3.
The least number, which is to be added to the greatest number of 4 digits so that the sum may be divisible by 345, is
 A. 50 B. 6 C. 60 D. 5
Ans
B
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• 4. If a = 4011 and b = 3989 then value of ab = ?
 A. 1,59,99,879 B. 1,58,99,879 C. 1,59,89,979 D. 1,59,98,879
Ans
A
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• 5.
For any integral value of n, 32n + 9n + 5 when divided by 3 will leave the remainder
 A. 1 B. 2 C. 0 D. 5
Ans
B
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### You may also like to study

A Numeral System is a writing system for expressing numbers; that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner.

What is Numeral?

A group of figures, representing a number, is called a numeral. Numbers are divided into following types:

Natural Numbers:

In mathematics, the natural numbers are those used for counting and ordering. In common language, words used for counting are ‘cardinal numbers’ and words used for ordering are ‘ordinal numbers’. These numbers are denoted by ‘N’

N = 1, 2, 3, 4…….n

Whole Numbers:

Whole Numbers are a group of numbers that includes numbers (0, 1, 2, 3, 4, 5, 6……). These numbers are positive including zero and do not include fractional or decimal parts.

These numbers are represented by W.

Prime Numbers:

A prime number is a number that is divisible only by itself and 1.
For example: 2, 3, 5, 7, 11…..are prime numbers.

Number System is one of the important chapters of Quantitative Aptitude Section. Questions based on Number System are asked in exams like - SBI Clerk Pre, SBI Clerk Mains, IBPS Clerk Pre, IBPS Clerk Mains, SBI PO Pre, IBPS PO Pre, IBPS RRB Office Assistant Pre, IBPS RRB Officer Scale 1 Pre, SBI SO, IBPS SO, SSC CGL Tier 1, CDSE, CLAT, MAT, SSC LDC, SSC MTS, SSC DEO, SSC Stenographer, LIC AAO, NICL, Railways, etc.

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