EASY
CAT
IMPORTANT
Earn 100

By multiplying with which of the following numbers, does the product of 8×9×10×11×12 become a perfect square?

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Important Questions on Numbers and Their Properties

HARD
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 10
What is the difference between the sum of the cubes and that of squares of first ten natural numbers ?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 11
If 3-9+15-21+… up to 19 terms =x, then x is a/ an:
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CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 12
What is the units digit of 213×212×347×468×778?
EASY
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IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 13
If the units digit in the product (47n×729×345×343) is 5, what is the maximum number of values that n may take?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 14
In how many ways, can 846 be resolved into two factors?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 15
If a number is divided by 15, it leaves a remainder of  7. If thrice the number is divided by 5, then what is the remainder?
EASY
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 16
A number when divided by 391 gives a remainder of 49. Find the remainder when it is divided by 39.
MEDIUM
CAT
IMPORTANT
Quantitative Aptitude for the CAT>Chapter 1 - Numbers and Their Properties>Practice Exercises>Q 17
p,q and r are prime numbers such that p<q<r<13. In how many cases would (p+q+r) also be a prime number ?