EASY
RRC Group D CBT
IMPORTANT
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If x is positive number, then which of the following is the least?

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Important Questions on Number System

EASY
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 4
The sum of the smallest four-digit number and the greatest three digit number is:
MEDIUM
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 5

In the solution of the multiplication question given below, 'x' is a digit.

2x and x7 are two 2-digit numbers and 2x×x7=2436, The value of 'x' is:

EASY
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 6
The product of an even and an odd number is always:
EASY
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 7
The sum of two prime numbers must be:
EASY
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 8
The sum and product of two numbers are 14 and 45 respectively. The sum of their reciprocals:
EASY
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 9
Find the sum of the first 10 prime numbers:
EASY
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 10
Which one of the following is a prime number?
EASY
RRC Group D CBT
IMPORTANT
RRB Level 1 Group D : A Complete Study & Practice Package>Chapter 21 - Number System>Practice Exercise>Q 11
The smallest value of n, for which 2n + 1 is not a prime is: